I've discovered I have one leg shorter than the other. It's probably because of circuit training: Jules forgets to tell us we're halfway through and should change legs so, because I always start with the same leg, one of my legs gets exercised more than the other. Hence one is, if not shorter, then certainly stronger.
Which is why I am so good at walking round in circles.
'I'm sure we've seen that tree before, Holly.'
'Isn't that the same tree we just saw?'
'Now this is just getting silly, Holly ...'