If you are anti-military this is not for you but if you've ever shot competition rifle, or just have an appreciation for anyone who is among the best at what they do, you can appreciate this Marine sniper who takes out a target over a mile away - through a brick wall.  The tactical breathing issues alone to make a shot from a mile away are unfathomable.    Better: after he makes the shot, the sniper stays there for another 12 hours.   

I don't recommend doing this at your local shooting range, even if they have a .50 cal.  Why?   The air will positively shimmer when that thing goes off and the recoil, even with a low-recoil gas system, will make inexperienced shooters physically ill.