The kind of person who freaks out yelling "Back door!" at the bus driver because they can't figure out how to open the back door. Usually they assume they are trapped and begin to panic. This is caused by being incredibily stupid, or simply because they've never been on a bus before.
Passenger: Back door!
Driver: Press the yellow strip
Passenger: It's not working! Ahh!
Driver: Bus Noob.