Someone is coming to kill you
OK so you are in a fully lit room that measures 10x10 feet. There is no window. There is a walk in closet. The light switch is by the door. There is no way out except for the door. The room is at the end of a 30 foot long hallway.
Approaching the door is a trained killer. He is armed with a silenced pistol, and he aims to shoot you dead.
There are a few items located around the room. A baseball bat, a butcher knife, a pair of nunchuckas, a 2x4 and a chainsaw.
The killer will be there in 5 seconds, you must make a split second decision on what to do. You have time to grab only one weapon.
What do you do?