Do you, or someone you know, ride with an airbag jacket/suit/vest? What are your personal experiences with them? Are they comfortable? Have you ever seen one deploy accidentally? Have you been an unwilling crash test dummy in one? Are there any little "gotcha's" about wearing one that you wish you would have known before hand? What should someone with little/no knowledge about this relatively new type of product know before plopping down some dosh?