well... wow.
That was... intense. I definitely was not expecting that, although in some twisted way I enjoyed it. I almost didn't like it, because the gore seemed really excessive at times, but then there would be a moment that made it seem artistic, like a shot from outside the chamber, or the gerbils on opium for contrast. Then it seemed in some bigger way to be almost making a statement about animal testing, yet still mainly being about the fucking ridiculous, and quite literal, blood bath.
So while I'm pretty sure the main purpose of this was to be a gore-fest, the fact that it came off as somewhat more than that made up for it. So uh... good job. I think.