He hardly even felt the pressure of the grip on his armor, so if the mech thought finger strength would be enough to crush him then he had another thing coming. By the time that happened the mech would have run out of batteries or whatever fancy technology such a thing used. The problem, of course, would then be if he would shot him while he was trapped. He needed to avoid this somehow before he could do anything else. 

He threw his created weapon in an underhanded way so that it didn't spin on it's axis, instead flying straight as an arrow towards the camera in place of the mech's head. Although it would be a very nice bonus if it hit and destroyed it, this wasn't the main reason for his action. He wanted his hands free so that he could create something else. Holding out his palms, which the mech neglected to trap in exchange for picking him up by the torso, he let his lava begin to flow out into a sort of a bubble shape around him; a half circle over his head, trickling heavily down the mech's hand, and forming into another half circle around his legs, attempting to encase himself in it's protective shielding before the mech would get him into position to fire, and if he did fire before the shield would completely gain it's strength in 3 seconds then it would still obscure it's view, which he would shift his head to the left as far as possible to trick him in case he shot dead center where his head would have been.

This process would require all of his concentration for now so he couldn't begin forming his next plan until it was over with.