"[The skeleton] in Seventh Voyage of Sinbad was more frightening than the seven in Jason and the Argonauts. [...] Because we had seven skeletons I thought we were going to get seven "X" certificates but we got a "U" instantly. But one skeleton on its own is possibly more frightening than seven, and also in Seventh Voyage the skeleton was in a dark, spooky chamber, while in Jason the seven were out in the open on a sunny hilltop."