What Is The Dumbest Challenge You've Done?

Would do it if it were you? If the answer is yes, it's still not dumb enough. Here is the thing, I have three genius older siblings. They all have had exellent grades during school and university and have always been honor students, the third one is I'd say the smartest of the three, but occasionally does the dummest thing ever for no reason at all. He sees life as a challenge, for example just the other day he put baby johnsons shampoo on his eyes, because the sticker said no more tears. I got curious about if any of you know any stories like this.