It’s going to be hard writing a description of this video without giving anything away. But just follow the instructions on screen before reading any further, and all will be fine.

This fun awareness test video from Transport For London has an important message: “It’s easy to miss something you’re not looking for.” And the footage proves it beyond all reasonable doubt.

You’re asked to watch the clip and count how many times the white team passes the basketball between them. You should get it right, as it isn’t hard at all. But wait, that wasn’t the real test.

I must admit I didn’t see the bear moonwalking through the shot at all, which just shows how your brain is capable of shutting out everything but what it has been told to focus on.