om nom nom nom
hold down you're fire button and alternate between the 5 key and the 2 key (after you buy the weapons) and observe the carnage. You can do this with any 2-7 weapons but the double shot pistol and shot gun seem to have the most devistating effect.
Its a fun game but what you get the OMGROFLSTOMP 1-3 hit kill 10k$ gun the game becomes boring and you end up quitting within the next 1-3 minutes.