Was the pain box from Dune the inspiration for the pain box in Phantasm?

Question

In both Dune and Phantasm, a character must stick their hand into a box where they suffer searing agony which only releases them once they have accepted the pain and faced their fears.

Is there any evidence (interviews, behind the scenes, whatever) where Don Coscarelli (writer/director/producer of Phantasm) addresses this?

Alternately, perhaps both take their inspiration from an earlier work I am unfamiliar with.

Answer 1

In terms of evidence, there isn't much to go on (nothing in the director's commentary, nothing in the making-of movie, etc) but there's a fairly big clue in that the event in Phantasm took place in Dune's Cantina.