One day you day dream during an ancient Egyptian discussion at school.
The teacher mentions something about a Scarab and you bolt upwards and scream "I GOT THIS COVERED" and run to your locker to get the 360 controller.
Then you come back to class to find everyone dead because there is a Scarab looking at you through a hole in the roof. You scream and activate the MAC gun.
In everyone elses' point of view, they only see you burst back into class holding a controller screaming at the ceiling.