There's like a component that goes on the outside and there's a battery pack. And it can either directly sync up to your computer or it works as a standalone.

Disney developed something that's not available yet. They call it the hollow tile, which is an updated version of that which doesn't have to be on a treadmill.

But but yeah, so yeah, the tennis thing. Like I was practicing. I'm legitimately sore and tired from how realistic and it's fucking crazy.