I'm liking all of these ideas, but the electromagnets and coils are a bit out of my range, as I have mechanical knowledge, and very little electrical.

However, I've got a CAD design of a direct linkage to a high speed motor I own, and will be prototyping. I figure that if I can't impart huge force with a tiny, light mechanism, maybe I can smash rapidly with little force, and in the end do more damage?

I'll post some pictures once I prototype this system.

Thanks for the help!