One thing most people overlook as a weapon: glasses.

I remember a fight back when I was in high school.

This guy had another in a headlock, holding him in place while his buddy laid the punches to the poor guy. The "victim" managed to maneuver a hand to grab the shades off the face of the guy headlocking him, and snapped an arm of them off, and used it to jab and poke him in the face. The guy let him go in pure shock and pain, and the guy immediately swung around to plant a punch to the guys' throat and drop him. When attacker #2 pulled a knife, the guy leaped forward and jabbed the glass' arm right into the guys' stomach before he could even react.

Where theres' a will, there will always be a way.