Go into Ammu-Nation. There will be a red circle to go into shooting practice. Get close to that circle, then throw over twenty remote explosives at that door. Without pressing the remote, step in the red circle. You will go to the target practice. Complete round 1, then quit. When your out of target practice, notice there are no explosives by the door, but you still have the remote. Press the remote. and there will be no explosion.