I saw that movie...
Wow, that movie really stuck! I remember seeing it on cable a long time ago. I must have missed part of it because I don't remember any tickling scene. But I do remember that it was one of the worst movies I've ever scene.
I posted this before, but there was also a tickling scene in a slasher flick from the same era called "The Burning."
It was a completely putrid rip-off of Friday The 13th, which was bad enough on its own.
As a disclaimer, I'm in no way advocating or endorsing any of these rotten movies. It's funny how they used to stick tickling scenes in slasher flicks. I vaugely remember a possible tickling scene between Linda Blair and Timothy Van Patten in a lousy horror movie, but I wouldn't swear to it and I forget the title.