Turn the other cheek and/or punch him in the nose.
Seriously though I just don't deal with guys like that, I think I would probably just block out anything he said and if I needed anything done for real do it myself. He could do it in tandem and we'd have some kind of challenge or something if he insisted. Then he would be humiliated and might actually learn something. Dunno I'm just real quiet with people like that and let them walk all over me on purpose because they show themselves and others who they truly are that way and I win every single time. I suppose to make any of that make sense, I would let him do as he does because the truth will come out and some day he is gonna get cold or lost or tired.
He would be allowed to touch any of my tools but not my TRACKER. He WOULD pay for anything he broke and if he didn't everybody that knew him would hear the story told in a polite but subtly humiliating way. I sound like the worst manipulator in the world but I don't mean it that way.
It's like mental kung-fu or something. I am not making any sense at all to anybody and will shut up now.
“Water is fluid, soft, and yielding. But water will wear away rock, which is rigid and cannot yield. As a rule, whatever is fluid, soft, and yielding will overcome whatever is rigid and hard. This is another paradox: what is soft is strong.” ― Lao Tzu