Retaks,
I've done that!! My bro-in-law up in upstate NY owns a .50 cal BMG (shhhhhhh, don't tell the Hildabeast and Chucky Schumer!!! [:'(]). Anyway, I remember going way up in the back pasture with him and shooting it against the hillside.
For those who never shot a .50 cal before... The kick is equivalent to a 12GA with a slug, that's all. But the percussion blastis what gets you! OMG, you can feel it in your heart. You can feel it rumbling right up into your brain! The .50 cal is a beast!!!!!!!!!
Butch A.
Edit: Back on topic... I've been at a skeet range before, and had a guy in a group near us, accidently squeeze the trigger on his Mossberg and send a bunch of 12GA shot right into the ground near his foot!

I thought the other guys in his group were going to kick the $*@&@ outta of him!!!