What to do if someone has locked their bike to yours?

There's also a nice combination spreader/cutter from Ogura - drill operated. You can replace the blades with curved ones I think.

http://www.ferret.com.au/c/Stainelec-Hydraulic-Equipment/images/Ogura-BC-300-cordless-rescue-cutters-from-Stainelec-Hydraulic-Equipment-640315-600x478.jpg

I never thought about this, I guess this uses an extremely low gear to let the drill power the jaws. How well do they work?