I was sitting on a wooden stool at a fan convention in New Jersey a few years back. The room was packed with people wearing olive drab, and I could feel that familiar, humble warmth that comes whenever MAS*H fans get together. It is a very special kind of energy, you know?

A young man in the third row stood up, clutching a vintage Radar O’Reilly action figure, and asked a question I have heard many times: “Gary, did you ever actually get confused between your lines and the things you wrote on your clipboard?”

I couldn’t help but laugh. It’s funny how a prop becomes such a part of your identity. To the audience, that clipboard was where Radar kept the heartbeat of the 4077th. To me, it was a lifeline. But his question triggered a specific memory from season five that I hadn’t thought about in a long time.

We were filming out at the Malibu ranch. If you have never been there, just imagine a giant dust bowl with the sun beating down on you like a physical weight. It was nearly 105 degrees, the flies were aggressive, and we had been working for fourteen hours straight.

Everyone was what we called “punchy.” That was the term we used when the exhaustion turned into a weird, delirious kind of humor. We were filming a heavy scene in Colonel Potter’s office. Harry Morgan was there, looking regal as ever, and Alan Alda and Mike Farrell were hovering in the background.

The scene required me to run in and deliver a massive list of incoming supplies—everything from penicillin to tongue depressors. It was a long, fast-paced monologue. I had taped my lines to the clipboard because, after fourteen hours in that heat, my brain was absolutely fried.

The director called for quiet. The cameras started rolling. I took a deep breath, prepared to sprint into the tent and nail the shot in one take so we could all finally go home.

And that’s when it happened.

I burst into the office, my boots hitting the floorboards with that specific, urgent Radar energy. I snapped a salute, looked Colonel Potter dead in the eye, and then flipped the top page of my clipboard to start reading the “urgent” medical list for the upcoming surgery.

But there were no medical supplies listed on that page.

Instead, Alan and Mike had spent the last thirty minutes, while I was in wardrobe, carefully crafting a full-color, highly detailed drawing of Harry Morgan. But it wasn’t just Harry. They had drawn him as a very disgruntled, very shirtless “He-Man” figure, riding his favorite horse, Sophie, but they had given the horse Alan Alda’s face.

Below the drawing, in big, bold letters, they had written: “GARY, IF YOU LAUGH, YOU HAVE TO BUY LUNCH FOR THE ENTIRE CREW.”

Now, you have to understand the pressure of that moment. The entire crew was standing there in the heat, staring at me. Harry was waiting for his cue. The film was rolling—and film was incredibly expensive back then. Every second wasted was money out of the budget.

I opened my mouth to say, “Colonel, we have thirty cases of morphine and six crates of plasma,” but what came out was a sound like a balloon losing air. A high-pitched, strangled “Heeeee…”

I tried to pivot. I tried to look at the ceiling to clear my head, but the image of Harry-Man riding Alan-Sophie was burned into my retinas. I looked back down at the clipboard, desperately hoping I could find the real lines hidden in the corners.

I didn’t find them. Instead, I found a little speech bubble coming out of the Alan-horse’s mouth that said, “Radar, why are you looking at my hooves?”

That was the end for me.

I didn’t just laugh. I folded. I leaned against Potter’s desk, my forehead hitting the wood, and I just started shaking. I couldn’t even make a sound anymore; it was just silent, convulsive joy.

The room was quiet for a beat. Harry Morgan, bless his heart, didn’t know what was on the board yet. He thought I was having some kind of genuine medical emergency or a heatstroke. He leaned over, deeply concerned, and said in that classic Potter bark, “Son? Radar? Have you been in the sun too long?”

Then he saw it.

Harry’s eyes traveled down to the clipboard. I watched his face go through a transformation that I wish we had captured on the actual film. First, there was the confusion. Then, the slow realization. Then, his cheeks started to puff out like a blowfish.

Harry was a professional. He had been in the business since the 1940s. He had worked with the greats. But when he saw that horse with Alan’s face, he let out a roar of laughter that I’m pretty sure they heard all the way back in Burbank.

Once Harry went, the floodgates opened.

I looked over and saw the camera operator, a big guy who usually stood as still as a statue, literally vibrating. The camera was tilting up and down because he couldn’t stop his shoulders from heaving. He eventually had to step away from the eyepiece and just put his head in his hands.

The director, who should have been furious about the wasted take, was doubled over in his chair.

Alan and Mike were leaning against the tent poles in the back, looking incredibly smug. They had timed it perfectly. They knew that after fourteen hours, we were all exactly one “funny drawing” away from a total mental collapse. They were the masters of the long game.

We spent the next twenty minutes trying to recover. Every time we tried to reset, Harry would look at me, think of the drawing, and start giggling again. And when Harry Morgan giggled, it was infectious. It was this high-pitched, musical sound that made everyone else start up again like a chain reaction.

Eventually, the prop master had to come in and physically take the clipboard away from me to wipe off the “additions” and put the actual script back on. But the damage was done. The “serious” tone of the scene was gone for the night. We ended up playing the whole thing with a slight twinkle in our eyes that probably shouldn’t have been there, but that’s what made the show feel real.

That was the secret of MAS*H. We weren’t just actors playing doctors and nurses. We were a group of people trying to survive the boredom and the heat by making each other smile.

When I look back on those years, I don’t remember the long hours or the dust as much as I remember those moments where we couldn’t breathe because we were laughing so hard. It wasn’t just a job. It was a family that knew exactly how to push each other’s buttons in the best possible way.

It’s funny how a piece of wood and a bit of paper can hold so much history. Even now, if I see a clipboard, I half-expect to see a drawing of Alan Alda as a horse staring back at me.

Humor was our medicine. And on that day, it was exactly what we needed to get through the shift.

Do you have a favorite Radar O’Reilly moment that still makes you smile today?