The Features from the Black Lagoon series—which brings hilarious B movies to an inflatable screen in Cal Anderson Park—continues with an old-fashioned crappy horror flick. The 1972 film Frogs features a dysfunctional family on an ill-fated camping trip, extended stretches of menacing ribbits, and a young Sam Elliott in the tightest jeans ever worn by man. Added bonus: The culminating plague of murderous amphibians is campy enough for queers and goofy enough to not freak out the kids. (Cal Anderson Park, 1635 11th Ave. Screening starts at dusk—9 pm or so, free.)