Watch Jeff Fabiszewski of The School of Liquid Rhythm Kayaking illustrate The Armpit Roll / Shotgun Roll. The Inuit call this roll Paatip kallua tuermillugu illuinnarmik. It simply means that the kayaker uses only one arm to roll with the paddle touching their shoulder. For the setup, the paddle tip is pressed against your chest near your armpit (but not under your armpit). The paddle is swept palm-up with one arm. The lift and buoyancy from the extended paddle powers this roll, no hipsnap is necessary. Keep the paddle in your “armpit” until you sit-upright. You do not need to return to the initial setup position.

I guess this can be a very vital role to know if you have an injured arm and you're upside down. Especially if you're at sea in freezing temperatures and swimming is not an option.

@Kayaker0678: not to be nitpicking but there's more to kayaking than white water rivers you know...

Good point. Wouldn't be hard even without practise. If your arm was screwed I think you'd roll with only one hand on the paddle just on instinct. Swimming in rough seas is a problem....