This reminds me of the spark plug ceramic demos. Little ceramic tip on a spark plug (isolated from the rest of the plug) make an effective car window smashing

This reminds me of the spark plug ceramic demos. Little ceramic tip on a spark plug (isolated from the rest of the plug) make an effective car window smashing projectile. No idea if it would work from inside the car / if you could get enough speed on it sitting right next to the window! https://www.reddit.com/r/mythbusters/comments/130js6/breaking_glass_with_a_fragment_of_a_spark_plug_is/ https://www.reddit.com/r/mythbusters/comments/130js6/breakin...