A Flash Mob Of Monsters?! Who Is Fast Enough To Defeat Them?

I love flash mobs, especially when you're in the middle of it and with no idea. It makes me think "What's going on?". It also became popular because of my favorite show, Glee, with scenes of them singing and dancing at the mall and other public places. With this type of approach it does get the attention of people to stop and watch and even record the number. I have seen 3 flash mobs in the past which always surprizes me with each having a unique way to end their performance with a bang.