I have a special kind of dislike for bike thieves, and it’s a mean one. That’s why I love this bike lock from Skunk Lock. From the outside, it looks like a regular U-lock, but hiding inside is pressurized vomit gas that is released if some bad soul decides to try to cut the lock. It’s tough enough to not accidentally get released, but if someone breaches the chamber, they’re pretty sure to vomit and run. You can get one for a pledge of $119 on their Indiegogo campaign, then go get a secret spy camera so you have footage of it when someone has a go at your lock.