Graduation Day

Its that time of year when graduation ceremonies are taking place every weekend, so you decide its time to have some fun. You hire a team of acting midgets and tell them you need them for a Viking play. They will all need to dress up as ancient vikings, with swords and guns. You tell them the play is going to occur at the local amphitheatre, which will make sense to them when they see 100s of people sitting in the audience. You tell them all they need to do is storm the stage and act like drunken crazed vikings. You tell them the more chaos and havoc they cause the better. You also tell them this will be the end of the scene and how when the curtain falls will be the cue to stop "acting."

Also for added affect- you have one of your buddys throw a beehive from one of the back exits so when people try to flee they are greeted by a swarm of bees