Hand cuffs are expensive, so zip ties are often used as a cheaper and fairly effective way of binding someone's wrists. If you find yourself bound by the annoying plastic, here's an easy way to break free.
"Imminent threat solutions" blog ITS Tactical shows you how easy it can be to break zip ties with a little practice. As you can see in the video above, all it really takes is a forceful smack in the butt (from your bound fists) fuelled by momentum, pushing outward as you complete the range of motion. That is, if your hands are tied behind your back. If they're in front of you, just pull in towards your stomach instead. You can find detailed instructions for all hand positions at the full post on ITS Tactical.
But why would you ever need to do this if you didn't deserve to be arrested? Perhaps you felt you were restrained unfairly in a protest, or you were tied up during a robbery. Any tool used for good can also be used for evil, whether you're trying someone up or breaking free.
How to Escape from Zip Ties [ITS Tactical]