Recycling an idea from a story I've been working on as of late...
The Paper Shredder Maniac.
I would carry around a large, industrial strength paper shredder with a wastebin attatched, paralyze my victims with a hammer, and then slowly but surely force them through the shredder.
Shut up, damn it; it would work!
As for clothing, a yellow turtleneck, a pair of green corduroy pants, and some brown dress shoes. No mask, just my maniacal, smiling face.
And my chase theme would be seventies porn music.
Oh, and as I mentioned at the beginning of this post, this is all part of an actual thing I've been working on.