The #fitspo photos of toned, muscular bodies in your social media feeds may motivate you to get your sweat on. But those pictures could have a negative side too.

Now, put them up if you were told to indicate when leaving a roundabout, even if you’re travelling straight through. And finally, and just to really confuse matters, who was told you definitely don’t need to indicate unless you’re turning left or right? Right, so that’s just about everyone, then? Well, we’ve got some bad news for you: everything we thought we knew about how to use a roundabout is wrong.