Mine is so stupid and embarassing. I got a bike about a month ago, I'm so new it's not funny. So I carry it downstairs, and get on the bike to ride down the narrow path out my apartment building. There are bushes on both sides of me. Well....I bought a bike one size too big and got wobbly, and fell as if in slow motion to the right, directly into the bush. Then half a block up, changed gears poorly and chain came loose.
I rode my little mile on city streets and determined there was no way I could keep that bike. Luckily, the bike store exchanged it for one smaller