This bot has gun arms instead of hands. I'm impressed to see him use his four legs like this. And rather smart if taking enemies alive is his mission.
However, even for a robot, this seems a bit... strange? Kirby did jump to the ground to dodge the beam, but she was neither pinned nor unconscious. Yet, somehow, he smashed both an arm and a leg. She's a military cyborg trained to take on robots and enemies larger than herself. After the first impact, I would think she would try to roll out of the way or something, instead of staying prone to get hit again.
Then he lifts her up by her leg... with his leg? Do his legs have pincers on the end? Even so, it seem a bit weird.
Meanwhile, why did the gunfire stop? Big Boy went invisible. But her commander, at least, should still be firing.
He's huge, made almost entirely of metal, has the robotic strength to carry or bench press thousands of pounds (assuming he had hands), has thick armor heavy enough to stop all but the highest caliber guns, and he can move so fast that not even cyber-enhanced soldiers have enough response time to move or dodge. (Or did she fumble her reflex check?)
Also, to literally get the drop on them suggests that he's very stealthy, too. How can almost a ton of metal walk so quietly, yet so extremely fast?
Having such an overpowered opponent reminds me of the diabolical stuff our old GM would pull on our party. :D