The Viruses took forever to die, some COULDN'T die until a few minutes later...
(http://i358.photobucket.com/albums/oo26/meman_5/Glitch.png?t=1286659392)
The Boss wouldn't die for five minutes... Then I finally pushed him off the edge and he came back... You can't tell because it's only a picture, but he just came back up and he's swinging his arm rapidly and isn't hurting me... My hits finally registered and I killed him.