…blade tip is moving up his arm.

Hi guys,

I hope you can help me with this movie as it’s been stuck in my head for the last 30+ years. This is what I can remember;

This is a sci-fi, I can’t remember where it is set or even if it’s on Earth, but there’s a group of people, maybe 6 or so. One of them is tough and has some sort of blades/knives as weapons. He can throw these and they come back to him – similar to a boomerang. One of the other members is a bit of a wimp (from memory).

The wimpy guy takes/borrows one of these knives and I think he must throw it or something, anyway something happens and the tip of the knife sticks into his forearm. When the tough guy tries to pull the knife out, the tip breaks off and starts to travel up the wimpy guys arm. He decides to cut his arm off to save his life. That’s all I can remember. Except I think in another scene the knives are used to try and open a doorway to a cave or something.

Any help would be appreciated

Cheers,
DrCarl.