The rock clangs off Knock Out's plating, and while it doesn't do any damage, it does leave a nasty scratch. Knock Out's optics flash and his lip curls, his saw whirring with renewed thirst.

"Watch the finish," he growls, swinging his saw arm down --

And then he's staggering back with another thunderous howl of pain, his free hand going back to his head. There's that horrendous rush of negative feedback again, splitting his processor down the middle.