Feel like giving an iPhone user a bad day? Well, there’s a new way to crash the iPhone’s built-in messaging app and it’s simple enough to execute. Just send a message with a large virtual contact file and it’ll send the app into a loop.

You can watch Youtube user “vincedes3” walk you through it in this clip:

There are fixes to this bug, so don’t despair if it happens to you. The easiest workaround is to ask Siri to send a text to yourself.