Even better if you've read Steven Adler's autobiography beforehand. Seeing him look so happy playing with his old band mates after having spent 1990 (the year he was booted from the band) to 2010 as a raging heroin addict is pretty cool.
After security refused to take action against a fan filming the show, Axl took matters into his own hands and dove off the stage into the crowd. The awesomeness was undone mere seconds later by the very uncool decision to abruptly cancel the show, but still, it takes balls to dive off a five-foot stage into a huge crowd of people.
Philadelphia, 1991. Axl stood up to some joker who had attacked the band's photographer and had him ejected as the audience cheered.