Effects and rating...
So I still cannot work out how they pulled off an effect like that in 1980 (I refer to the openning scene and the machete)!
Animatronics? That's some advanced effect for 1980!
On one of the posters here on imdb - it rates the film as PG - never in a million years! This would still get a hard R today!
http://www.imdb.com/media/rm2711788800/tt0080707
fM