Back in the good old days, when La Blonde Parisienne and I were bright young grad students working in the same genetics lab, we used to play a little game called “Too Stupid To Be A Scientist.” The game goes like this: you do something stupid, and you tell the other person what a stupid thing you did, and they cheer you up by telling you something even stupider they did. For example, one day I went to lunch with La Blonde and said sadly, “I set the trash can on fire today.” She responded, “That’s nothing! One time I thought the ethanol had all burned off the little spatula, forgetting that ethanol burns clear, and I put it back into the tube of ethanol and the whole thing blew up.”
She offers some more examples, and the commenters chime in with their own stories of stupidity. It’s fun, and everyone can play.