Forget laptops... I will probably need knee replacement surgery at some point because of people slamming their seat back into my knees.
At 6'5" I am pretty much wedged into any economy seat (other than bulkhead/exit row), so I can't always adjust to let the seat in front of me recline.
My favorite was the person on a CRJ who repeatedly pressed back on their seat because my knees were keeping it from fully reclining. It hurt so bad my eyes were tearing up, but they actually had the audacity to turn around and glare at me because I was preventing them from reclining.
