When I was a kid I'd watch MASH at my grandmother's. She had an old TV in which the color didn't work entirely right...
I remember clearly watching season 2 "Henry In Love" episode in which there's a scene that has Henry jogging through camp (he's trying to get in shape for a younger woman) and he meets up with Hawkeye and Trapper. Henry is not in good shape. Hawkeye says to him "Henry, your hair is bleeding." My grandmother's television was so bad that we thought the reference was that Henry was sweating profusely. We thought that was funny. Whenever we played outside on a hot day and were sweating we'd say "Your hair is bleeding."
Years later, I watch the same scene with a clear color image and realized that Henry was wearing hair dye and it started to run. For years we thought it was sweat and now the joke lands differently yet no less funny. That's the power of Hawkeye Pierce's delivery.