Cavegirl

Thanks to a strange crystal, a shy student finds himself in the Stone Age, where he falls in love with a beautiful cave woman and helps her clan stave off a tribe of cannibals.

Cavegirl is a 1985 fantasy comedy movie directed by David Oliver Pfeil, starring Darren Young, Saba Moor-Doucette, Daniel Roebuck. It holds an IMDb rating of 3.7/10 from 1,032 votes and runs 1h 25m.