[Right, that. Shun can't say he hadn't been a little questioning about that entire concept when he got to Synchro either, and having to explain it on is going to be a little bit weird. From the look on his face, he's still figuring out how to word it in a way that doesn't sound patently ridiculous even as he opens his mouth.]

It's a specialised system they use in the Synchro Dimension. It's something like a motorcycle with a duel disk built in, they use it for Riding Duels, which are a bit like a duel and a race at the same time. Obviously most people don't have the skill to manually use something like that and play at the same time, so they have an autopilot system which maintains your speed and stops you from running into walls or anything stupid like that.

[Not that it saves anyone from actively malicious acts like having someone ram into them, but he supposes it's better than nothing.]