Depending, of course, upon how hard you hit them with a rock. (ha, ha, I kill me.)
Seriously, though, thanks for bringing this back up. I missed it first time around. Just one thought:
When trying to determine how an earlier culture lived, it's very easy for us to put our presuppositions into their culture. There are things you know, there are things you can reasonably deduce, and there is projecting your suppositions onto blank slates. I thought this article did a nice job of not supposing more than was reasonable about a culture, although an antler poke in the butt is, IMHO, not enough to deduce anything about the violence of the culture.
Exactly, what occurred to me was this antler injury could have just as easily been inflicted by the original owner of said antler, a big angry buck deer.