The X From Outer Space (1967)

In which The Greater Tokyo Area is yet again attacked by a giant monster, and the combined military needs their collective fats pulled out of the fire by an astronaut team that makes F Troop look like Mensa members.

Bonus points for Bic lighter based jet engines, awkward and unrequited love, girls taking showers together, and the overzealous use of menthol shaving cream in the weirdest way possible.