How to Make an Emergency Vehicle Escape Keychain

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My pal Matt pointed me to a nifty Instructable for putting together an emergency vehicle escape keychain. Pretty handy, right?

A bunch of commenters didn’t believe that the tiny piece of spark plug on there would actually break the car’s window, which reminded me of something another friend wrote about a burglar tool called “ninja rocks.” Check out the video of a ninja rock vs a brick:

Part of me really wants to make one, and part of me is intimidated by the two part epoxy it calls for. What do you guys think? Is there some other adhesive that’s a little less….two-steps and fumey…that would work?

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