This might provide some context: https://www.youtube.com/watch?v=JtWl9Mz2SPg https://www.youtube.com/watch?v=JtWl9Mz2SPg A "self-defense" keychain with a 1 inc

This might provide some context: https://www.youtube.com/watch?v=JtWl9Mz2SPg https://www.youtube.com/watch?v=JtWl9Mz2SPg A "self-defense" keychain with a 1 inch steel ball enclosed within a monkey fist knot at the end. At 0:18 the demonstrator smashes a laptop with it. I found that pretty funny.