Lift Hiker
A person who walks into an elevator, presses the floor they require then obliviously stands in front of the buttons so no other patrons may press the button they require.
stu: excuse me could you kindly step aside so that i may press the button?
Lift Hiker: oh sorry i didnt realise,
stu: Thats quite alright, (under breath) stupid lift hiker!
Lift Hiker: oh sorry i didnt realise,
stu: Thats quite alright, (under breath) stupid lift hiker!