Obviously, the guy didn't know what he was doing. I can see a carbiner being
used like you would use brass knuckles, but I think that you'd probably do
more damage to your fingers than the person you hit. It's possible that you
might be able to use it as a thrusting type of weapon I suppose.
Now, that glass bottle would have been a must remove item. There's just soooo
many possibilities for that one. I guess that the photons could be used to
flash into someone's eyes to temporarily blind them.

I'm surprised that he let you push him around like that. Was he like a security
guard or something like that?

Cheers