I was having a nice time at Dreams and Nightmares when my internet decided to crap out on me. When I was finally reconnected, I discovered that it still used my emergency revive while I was still disconnecting. Nova pointed out to me that one of the old patch notes (http://wiki.spiralknights.com/Release_Notes_2013-08-06 Thanks, Nova) says that an emergency revive won't be used while you're having connection problems. Apparently, having connection again for half a second makes the revive activate.