One thing I really like about shotguns is the variety of ammunition available. Obviously slugs and shot of various sizes have their place, but what "specialty" ammunition have you fired? What did you think of it? Less-lethal, novelty (just for fun), "dragon's breath", breachers... what have you shot and what did you think? I'm interested in both positive and negative experiences, and in both practical rounds and ones you decided were impractical. If they were impractical, were they enough fun to be worth shooting anyway?