MRT is an AutoX car using a bike engine so of course no reverse.
So what. In real life racing of ANY form if you off and get stuck you are on the long walk back to the pits. If you dont want your race to be over don't fall off the track
If you do fall off the track and get stuck just man up and accept your race is done. Everyone is in the same situation so why the problem.
Which real life race series allow the driver to get out and try move their car while the race is on? They don't the stuck car is removed from the track!