Ignite NYC: Learn how a samurai katana is made in 5 minutes

Ignite is a series of quick “speed presentations” recorded around the world. And it’s not your normal long, boring slide presentation (who hasn’t experienced death by powerpoint?) because there are a few rules.

1. your total presentation can only be 5 minutes.
2. you get 20 slides, and they auto advance every 5 seconds.
3. you can only have one speaker presenting the information.

So Jon Kahan did a really quick presentation on the katana. It’s well worth your 5 minutes to watch, you might even learn something.

[via Make]