I've done that during exceptionally busy times, like dorm moving day. If I wait for the elevator to be going my way on its return, it will already be full and I

I've done that during exceptionally busy times, like dorm moving day. If I wait for the elevator to be going my way on its return, it will already be full and I'll be left standing in the hall. Of course, I think everyone's probably done it at least once simply due to inattentiveness.