Re: How about a high power laser burst ? (or things I saw in Star Wars)
Can you do the bazooka thing with a rail gun? In other words fire something backwards as well so the momentum transfer to whoever is holding it is small? Such a thing obviously has limited uses though: I'm not seriously suggesting it.
(Also it's no better than a rifle from the safety perspective and in fact worse: whatever it fires will fall somewhere as nothing man-portable is firing anything with orbital velocity.)