Nah, he meant it as a joke. Everything's fun and games until someone loses a decent portion of their skull from just the ricochet.

And that is how easy it is for someone to die.

All the indoor ranges I've been to (admittedly not many) are designed so even shots waaaay off target like this one won't ricochet. Usually there are at least a few holes in the ricochet-proofing. Loaded firearms should always be pointed downrange, so even though this guy f-ed up badly, at least he had that part right and the actual hazard here was minimal.

Like when he pointed it straight up at 0:04, causing (and rightfully so) several other the others to cringe and lean away?

Give this man mustache and he looks just like Farva in Super Troopers.