If this movie is not a RiffTrax movie then I do not know what one is. I watched the movie on TCM on 19 July 2015. It is discribed as "Picinic plans are ruined for four friends when they stumble onto an occult book". It has it all from bad acting, to bad editing, and very bad special effects.
SC Johnson commented
C’mon guys! You aren’t afraid of Criterion, are you? I’ll even let you borrow my DVD of it if you want.
I want them to Rifftrax this just to see what they do with the old man in the cave! The guy looks like he belongs on 20 sex offender lists!
STAR WARS STINKS commented
I was on here to request it, so good job! It's so bad. :)
Actually, it's also on Hulu as part of their Criterion Collection(!), and it is hilarious for the fact that the sinister park ranger is as about as threatening as Torgo in Manos. And the fact that if this occult book is so powerful, why would you leave it out in the open for someone to find and read it? Sheesh, definitely Riffing fodder here.