Technically it's called 'Big Daddy Kills' and was taken from the Kick-Ass soundtrack, but it's the same composer who just varied it slighty from 28 Days Later. I only heard it for the first time in Kick-Ass though so that's what I'm crediting it to

Off-hand, are there any more pictures floating around from this event? I'm sure I saw several cameras out and about but can't recall seeing many post-event snaps.