breaking zip ties isn't easy... but if you have a paper clip or something, it's a simple mechanism and you can lift the little plastic tab and loosen it...
or melt it with a lighter....
Use the Heisenberg method, bite a lamp cord with your teeth, use the ends to cause a short burning the zip ties and burning the piss out of your wrists. You're then free to go hide your methylamine at your car wash.
I use a knife and it's hard enough with that fine point. Unless your zip ties have massive openings and lots of slop it would be impossible with a paper clip.
well ive definitely done it with a paper clip on a normal zip tie... the cop ones are a lot thicker so it seem like the tab would be bigger and easier to fuck with...