I'd try to lure them into a choke point, where they could only come in one by one. Hopefully, it'd be strong enough to resist whatever weapons they have, and they'd be stupid enough to enter it.
If those conditions were met, I'd kill as many as I could, trying to make a body-blockade in the entrance.
But, if those conditions were un-met, I'd go into the middle of them, start fighting, and if I cause enough confusion, get them to start killing people who are not me.
I think the most likely thing that would happen would be me drowning, though.