bug

what game version?
what map?
because on most maps their hitbox is one sided, so by putting it on the edge of a map, if will tip off, and because the hotbox is onesided, it will try to suck up the part that is hanging off if it touches the underside of the map.
it's exaggerated in this instance because the T-Series has so much momentum.
This may be incorrect, because it looks to me you accidentally created a perpetual motion machine using a T-Series and a little bug lol.
I think its just localized to that map though.

 

This is the latest version of the game, this error is on EVERY map containing the edge of the map (except, of course, flat grid map) It works on any car. And this is just fun, I created the mobile perpytum.