This movie is probably circa 1965-1980. It has the feel of a Mel Brooks comedy. I think there might have been a jungle/ treasure hunt going on. There is a running gag throughout the film where the lead actress trips/falls, and when she stands up again, she is in only her bra/undies. This has been driving me nuts. I saw it in the mid 80s and was curious enough to try and hunt it down again. Thanks in advance for your help!