''Tropic Thunder'' isn't the first film to incorporate tantalizingly ludicrous coming attractions for fake movies. Here are trailers for four releases we'd love to see -- but, alas, probably never will. Watch 'em and then tell us what you think
1. JEWS IN SPACE
(From History of the World: Part 1, 1981)
Three words: Jewish Star Wars. Just thinking about this spot, which features a ship shaped like a six-pointed star, makes us frailech.