It is funny how memory works when you get to my age.

People always ask about the heavy stuff, the episodes that made the world cry, or what it was like to carry the weight of a show that meant so much to so many people.

But when I sit down for these interviews, like the one I did recently for a retrospective, my mind does not immediately go to the awards or the scripts.

It goes to the smell of the Operating Room set.

If you ask any of us what the funniest day was, we all usually land on the same general era of the show.

We were in that cramped, miserable, wooden shack they called a studio set.

It was a hundred degrees under the California sun, and we were pretending it was a freezing Korean winter.

We had the parkas on, the heavy scrubs, and the surgical masks that acted like little saunas for our faces.

The thing about the OR scenes was that they were the heartbeat of the show, but they were also the most grueling to film.

You’re standing on your feet for twelve hours.

The “blood” we used was a mixture of corn syrup and red dye, and after a few hours, it became incredibly tacky.

If you touched a surgical instrument, it stayed stuck to your glove.

If you leaned against the table, you were glued to it.

On this particular afternoon, we were filming a very intense sequence.

The script was heavy.

Alan was in the middle of one of Hawkeye’s signature rants about the insanity of the war while he was supposedly saving a young soldier’s life.

The director wanted a tight close-up on his hands and the “wound” he was working on.

The rest of us—McLean, Wayne, and myself—were crowded around him, trying to look professional and exhausted.

We were all beyond the point of normal fatigue.

We were in that “danger zone” of exhaustion where even a fly landing on someone’s nose could trigger a total collapse of decorum.

The prop master had rigged up a new pump system to simulate a bleeder in the patient’s abdomen.

It was supposed to be a subtle, realistic pulse of blood to add to the tension of the surgery.

Alan took a deep breath, looked into the camera with those piercing eyes, and began his monologue.

He was being brilliant.

He was being the Hawkeye Pierce the world loved.

And then, the prop master gave the signal to start the pump.

The pump didn’t just pulse; it revolted.

Instead of a realistic, rhythmic trickle of stage blood, the machine let out a sound like a dying vacuum cleaner and fired a high-pressure stream of red syrup directly upward.

It didn’t hit the floor, and it didn’t stay in the “patient.”

It shot straight into the air, arched perfectly over the surgical tray, and hit Alan Alda square in the forehead with the force of a garden hose.

For a split second, Alan didn’t move.

He just stood there, still holding a pair of forceps, with red syrup dripping down the bridge of his nose and into his surgical mask.

The monologue died in his throat.

The rest of us froze.

In a normal workplace, you would ask if someone was okay.

On the set of MAS*H, after fourteen hours of filming in a heatwave, that is not what happens.

McLean Stevenson was the first to go.

He didn’t even laugh out loud at first; he just made this high-pitched, wheezing sound, like a teakettle reaching a boil.

He was shaking so hard that the surgical lamp he was holding began to dance, casting strobe-like shadows across the entire set.

Then Wayne Rogers started.

He tried to hide it by burying his face in his elbow, pretending to check the patient’s vitals, but his shoulders were heaving.

He looked like he was having a physical crisis.

I was standing right next to the “blood” pump, and I could see the prop assistant’s face turning a shade of white that matched the sterile sheets.

He was frantically trying to turn the valve off, but the more he twisted it, the more the machine sputtered and coughed, sending little rhythmic squirts of red goo onto the camera lens.

Alan finally broke character.

He wiped a glob of syrup from his eye, looked at the prop assistant, and in that perfect Hawkeye cadence, he just said, “I asked for a bleeder, not a fountain from the Bellagio.”

That was the end of it.

The entire room exploded.

The camera crew, the lighting techs, the script supervisors—everyone just gave up.

When the “giggles” hit a set like ours, they don’t just pass in a minute or two.

It’s a contagion.

It gets into your bones.

The director, who had been trying to keep us on schedule, started shouting for order, but even he couldn’t keep a straight face when he saw the state of the “patient.”

The surgical table looked like a crime scene in a candy factory.

We tried to reset.

They cleaned Alan up.

They wiped down the table.

They gave the prop master a stern talking-to about the PSI of the blood pump.

But every time we got back into position, someone would make a tiny “psst” sound with their mouth, mimicking the pump, and we would lose it all over again.

Alan would start his line, “The thing about war is…” and then he’d catch a glimpse of a tiny red spot we missed on the ceiling, and his voice would trail off into a giggle.

Then McLean would start the teakettle noise again.

Then I’d start laughing because I knew McLean was about to get in trouble.

We spent the next forty-five minutes trying to film a thirty-second bit of dialogue.

Every time the “patient” had to lie there and listen to us lose our minds, it made it funnier.

This poor extra was trying to play a wounded soldier, and he had three of the most famous actors in the world crying with laughter over his stomach.

Eventually, the director had to literally clear the set.

He sent us all to our trailers to “cool off,” which was really just code for “go laugh until you’re tired of it so we can finish this and go home.”

I remember sitting in my trailer, still wearing my scrubs, just staring at the wall and laughing to myself.

It was the release we needed.

The show was so heavy, and the work was so fast-paced, that those moments of absolute, unprofessional chaos were what kept us sane.

When we finally got the take, it was perfect.

If you watch the episode, you can see Alan’s eyes are a little red, and he looks genuinely exhausted.

The audience thought it was great acting—that he was showing the strain of the war.

In reality, he was just recovering from being sniped by a blood pump and laughing for an hour straight.

That was the magic of that cast.

We could go from a high-pressure hose of syrup to a profound statement about humanity in the span of an hour.

But I’ll never forget the sight of Alan Alda standing there, covered in red sugar, looking like he’d just lost a fight with a juice box.

It’s those unscripted, messy moments that made us a family more than anything written on the page.

What’s the one time you’ve laughed so hard you couldn’t stop, even when you knew you were supposed to be serious?