OP deserved it.
Find them. and snap there necks one by one.
Doesn't really matter if he knows how to fight guys. This isn't Karate Kid where he takes out a whole gang of people. 5-6 vs one is very hard to fight off.
That's not even a sentence.
http://www.liveleak.com/view?i=a65_1313774743
Chances are he didn't have any weapon nor does he work out/has the loving balls to do that.
I saw that ninja