Grizzly bear, hippo, lion...Dame Jessica Ennis-Hill. What do they have in common?
They can run, and run fast.
Okay, so it's not your normal starting line up for a race. But, we wanted to find out just how Dame Jessica compares in speed to her furry counter-parts.
We asked the BBC's London 2017 analyst seven vital questions, comparing her running, jumping and throwing abilities to an assortment of animals, wheelie bins and king-sized beds...
If you want to find out how you can get into athletics, read the Get Inspired guide.