Coriolis: Yeah it's all in theory, in real life I think they'd rush that guy to the nearest hostipal
BD: A modern day scoped rifle like the M82A1A .50 Caliber SA Scoped Rifle has a muzzle velocity of 2800 ft or 854 meter /s.
http://www.marinescoutsniper.com/50cal.html
Sound is ~ 750 miles / hour. That's why I mentioned the cruise missile