When I was about 5 I loved to watch my Pop shave. So one time I took a shower and found a razor of his. Needless to say, I fucked up my lip, and anytime I see a plain orange/yellow razor I think of that.
Another time I tried to see cans of soda at the entrance of my neighborhood with a sign on line paper, written in pencil it said "Soda 25 Cents". I didn't even get a honk.
A really sad thing I remember, about 4 or 5 years ago when I first started playing guitar, I though Nirvana was the best and hardest thing to play ever. So I called a girl I liked that I knew liked Nirvana. I tried to play Polly for her, fucked up, she hung up, and I didn't play guitar for the rest of the day.
