Sci Fi a late 70s or early 80s movie name
I want to know the name of this movie but I don't remember much of it. I know its on another planet or in the future.
There's this scene, I guess the hero was captured by his enemies and he has to put his hand on a rock with some holes, the problem is if he chooses the wrong hole there's a mortal creature inside and it would bite him.
There's another scene I remember, the hero uses a sort of car that rides in a rail( I guess it was white and looked somehow like the DeLorian of "Back to the Future").
If anyone could help. Thanks!