Open UP the scripting engine and go to the "ex-Constraint" example script. Look for where it reads "(create("bowlball",". Replace "bowlball" with "grenade", then click "Run Once" about fifteen times. There will be a greate mound of grenades floating in the air. Note: this glitch works with any item except for the guns, hoses, missiles, etc. (any item that you cannot throw.). You might also want to turn the graphics as low as possible.