Deon wheezes, trying to get his breath back. He hasn't been hit in the stomach since secondary school. He's in pain, but he's angry, and the anger is overriding what little common sense he has.

"You killed Chappie's family," he growls, his voice hoarse, "you tried to kill me. I think I'm entitled to a little payback--"

And he swings wildly for Vincent's jaw.

Deon, you walnut.