1. Hannah's Q-Tip Accident (Episode 9)
Face-grabbing, door-slamming, stranger-shoving: all of Hannah's stress-induced compulsions are hard to watch. That being said, none of them hold a candle to watching her puncture her own eardrum with a Q-tip. Her screams ("I heard air hiss out the hole!") will haunt our dreams forever – or at least until Season Three.