My freshman year in college I kept my alarm clock in the middle of a bookcase across the room. Mornings after studying (or partying) late, sometimes I'd climb down off the top bunk, walk across the room, shut off the alarm, and then climb back into bed WITHOUT WAKING UP. My roommate, who had the bottom bunk, not only would be wide awake but he'd complain that I stepped on him when climbing back into my bunk.
That was one of several ways I was a hugely annoying roommate.