Made on about forty quid and some coconut halves, yet somehow funnier than anything with an actual budget.
Fun fact: "Partly financed by Pink Floyd, Led Zeppelin, and Elton John, who were fans of the TV show."
Three scientists start a ghost extermination business and somehow Bill Murray barely has to try.
Fun fact: Dan Aykroyd wrote the original script for himself and John Belushi, who died two years before filming.