The moment you are left awestruck as a BAMF/knight in shining armor turns out to of been that nobody, clumsy fumbling geek you once knew.
Before(Book 1): Clumsy, forgetful, few to no close friends, toad for a pet
1. He killed Nagini, Voldemort's snake, with the Gryffindor sword, whilst his head ablaze.
2. Stood up to Voldemort, saying boldly he wouldn't join them until 'Hell freezes over'.
3. He kept recruiting Dumbledore's Army even after Harry, Ron and Hermione had left.
I just saw 'Hiccup' in How to Train Your Dragon 2... Longbottomed again!