Look, the important thing was that he was working on it, alright. He got there when he got there, face mask firmly over his face, as it tended to be whenever he left the house. Good luck guessing if he's doing it to hide something or just because he feels like wearing it.

"Hey! Sorry about waiting, I got a little caught up with something, haha!" Ground bridged right in like it wasn't an issue (probably because to him it wasn't). Would have taken a lot longer otherwise, his alt mode wasn't that good at speed.