This is one of those classic "wacky, shower ideas".
Imagine you went (electric) go-karting. You come in, put on the driving gear and VR/AR goggles. You see not only the track, but you also see Lakitu (the guy floating on a cloud) who starts the race. And after the race starts, you see and can pick up miscellaneous items on the track in classic Mario Kart fashion (bananas, shells, etc.) which you can then use slowing down other players.
Because the karts are electric, it should be possible to control/change their velocity at will - depending on the weapon/item you get hit with.
Let me know what you think. I might actually use it as my final VR design project, trying to make it a real thing. 😅