-Parking my bike in front of a subway station, not checking the quick release on the front wheel when I unlocked it at the end of the day. Popped a wheelie onto the curb arriving at my house, did a cartwheel across my front lawn.

-Replacing my brake pads, not tightening them enough. Watching my front brake pads come loose and spin around while trying to brake downhill.

-Not taking the bolt out of my crank before screwing in the crank puller...why are all these metal shards coming out of my crank?!