I think your buddy probably watched one of the myriad of "50 cal Sniper kills Taliban" videos on YouTube, which are really rock-chuck hunting videos.
I tried setting some of those jackwagons straight a couple times, even directed them to the original video "Varmint Safari" with little success.
Like
this one. (warning, graphic marmot content).
And it you REALLY want to make yourself dumber, read the YouTube comments.