What do you get when you give a bunch of total strangers a MP3 file in which they are guided to a secret location and told that once arrived, they will have to simulate an epic battle to the death? This is what you get:

The folks of Improv Everywhere are behind this, and they plan to hold other similar events in the near future. If you want to be part of the next ones, you’ll get all the details in advance by signing up for their mailing list.