The Standard D&D Campaign:

Index arc.:

The Burgermeister's Batman Gambit.
Null killing the Implacable Man Agent Black twenty times in about as many seconds.
... And then Prism managing what Null couldn't, and actually forcing him to retreat.
Daedallus using Aerial Mastery and a jump-kick to get past three agents.
And, last but CERTAINLY not least, Firewall breaking The Muse out of the System's headquarters without any plan whatsoever.

Dan when he realizes that destroying the fourth rune requires burning down an entire city.
Dan manages to kill Jill's character by breaking his own character.
Dan: As Rugaru is coming in, I'll cast a Max Power Wild Surge (Non-Anarchic) Energy Burst... Cold.