Well, he expected a lot of things, but hitting a wall was not one of them. Even someone of Sixshot's size shouldn't be this damn heavy. He certainly didn't have this much trouble with Tarn.

There's a hiss from his own vents as he continues. For whatever reason, Sixshot hadn't retaliated, so he figures he'll at least follow through with his plan. Putting more force behind the push, his spark starts to strain the cold-constructed actuators beyond what they were built to exert. His frame was strong, surely, but it didn't quite graft like a war-forged chassis would.

Still, he attempts to lift up the leg just enough to be attempt to disbalance him and knock him down. All that weight could be used against Sixshot with a little movement, right?