You people do realize that you can effectively use the shotgun technique with out a firearm? In fact this weekend my buddies and I used a digeradoo to great effect! There is no reason to use a weapon as it will only leave residue inside the barrel which you'll have to clean out. I'm not saying that if you use this technique with an actual shotgun you're going to get your head blown off, just that there are plenty of other options to reach the desired result! Be creative. Not stupid.