I think the weapon would have a recoil, as seen there. Normally, a laser wouldn't have concussive force, but we can imagine that military-grade "lasers" in the future are backed with some secondary propellant, so as to produce a violent blow on impact, along with the heat. Comes in handy against enemies that may have self-contained force fields, since it would provide "stopping power" if they were charging you. Remember, this is science fiction. haha