Walk and Lock

My office overlooks a parking lot. People lock their cars three ways. Which are you?
1) The "walk-and-lock" confidently walks away from their car and waves the magic button in the air behind them to lock the car.
2) The "lock-and-walk" stands beside the car to lock it before walking away.
3) The obsessive-compulsive (me) " lock-check-and-walk" locks the car, checks a door handle or two anyway, and finally walks away.

There is a fourth category -- the few that apparently do not bother to lock their car.