NOTE: This glitch works best in multiplayer on the same console.
This glitch can be used in any map in the multiplayer menu as long as there is at least one tall accessible area in the map. Climb to the highest point of this area with a character that has fragmentation grenades (like the Veteran or the Mercenary). Then activate one of your grenades and wait until it's about to explode. Quickly jump off this high point and make sure you die in midair. Once you come back to life look in the air where you blew up and, if the glich worked, you should see your dead body floating in midair.
Added by: Glitchboy Mar 3rd 2009, ID#2537