There's no time to focus on the pain. The monster doesn't look fazed at all by the kick (unsurprising, considering how weird chimera biology must be), but at least it's slowing down.

Duster takes a deep breath, finds his rhythm, and runs at the monster, kicking it with one foot, letting the inertia spin him downwards, and as he pushes himself off the ground, hits his two more times.

The monster makes a grab for him with its fingers, but Duster rolls out of the way in time, now removing his smoke bomb.