The Vanishing Plasma Grenade is a glitch in Halo: Reach's Forge mode. It may be performed with at least two players. The glitch is relatively simple to perform: - Player A goes into monitor mode and creates a Plasma grenade. - Pllayer B picks up the grenade and sticks Person A. - Player A goes into Spartan/Elite form before the grenade detonates. - If Player A goes back into monitor mode, the grenade will have vanished.