I bought a H&R single shot 12 gauge after watching this video:
http://www.youtube.com/watch?v=ES59LtA7XE8
Shot it a few times in the winter wearing a heavy Carhartt jacket. Shot it a few times in the summer wearing a T-Shirt. Haven't shot it since.
Got a steal of a deal on a H&R .410 - that one is fun to shoot.