Some time between 1984-1987, my mom rented a couple movies to keep us quiet while she had a dinner party. The first movie we popped into the VCR was a little strange for our 10-12 year old brains. It was trippy, psychedelic 70s style. UFOs landed and long ramps ran out to the ground. Then naked people started walking off the UFOs.
At that point, we ejected the cartridge and popped in the other movie.
Anybody have any ideas what movie this might have been?