TF2 Alien Invasion Strange Taunt - Burstchester

I unlocked my very first alien invasion update crate opening and very lucky enough to get strange taunt burstchester, where an alien pops up from your chest. This taunt can be used for all classes; heavy, scout, sniper, medic, pyro, demo, soldier and spy Assassin Grade Strange Taunt : Burstchester from TF2 Alien Invasion Update Crate