Stop by K-Mart and get a toy Chainsaw, a Shotgun with a shoulder holster, and some cardboard tubing. Make sure the tubing fits over your fist and wrist, and make sure the shotgun looks right and isnt a lame wild west one or anything. You may be up for some spray paitning, most toy chainsaws come in bright colours these days. You may want to paint it regardless to add some blood splatters.
Attach the cardboard tubing to your correctly coloured chainsaw, and check that you can hold it with your hand inside the tubing. Get an old blue/grey shirt and some tan pants or jeans, rip them up a little roll them round in some dirt, then add some fake blood if you wish.
Put everything on, tuck the cardboard tubing under your sleeve (right hand, if you want to be authentic), and sling the shotgun in holster over your left shoulder. Oh, and dont forget to smile
![:)](../../smileys/smile_new.gif)