What shocked you guys more, Draco's attack on Harry on the train, stamping on his face or Harry's attack on Draco in the toilets.
I found Draco's attack a lot more "oh my God". It was just the way that he did something so horrid when Harry was already defenseless.
The fight in the toilets was really nifty. Snape must have been trailing Malfoy quite closely though to be able to intervene so quickly.