Dun think so, unless Hollywood physics works. Becos if you watch
enuff CSI and study physics, you will realize that a bullet
contains about as much energy then a softball thrown by a
pro-league pitcher, quite a bit of energy, but not quite enuff to
break a neck with the sheer impact. The energy you get when whapped
with a bullet is as much as the energy of the recoil experienced in
the gun when the bullet was fired (newtons laws of motion).
Therefore, people will not "fly" (usually into some large glass
object) when shot by shotgun rounds like when we see in the movies,
becos to impart enuff force in the buckshot to launch a person
backwards will mean that the person firing the shotgun will also
experience the same recoil force in the opposite direction when he
pulls the trigger, newton's law in action again.
However, if the helmet strap is not on correctly or secured well,
the bullet can knock your helmet back with enuff force to strangle
you or give you a sore throat.