In Fly Me, Lyllah Torena plays a stewardess who gets captured by slavers. She's taken aboard a boat and is kept bound hand and foot in a cabin.
She's stripped of her clothing, barefoot, bare-chested, and clad only in panties (which is why I can't show more still pictures of her than I want--we have a a no nudity clause here).
Seeing that her guard has fallen asleep Torena gets up and works her way over to a table, where she smashes a glass to use the shards to cut her bonds.
It's a good thing for her that the guard is s very heavy sleeper. She manages to get free, only to get recaptured. Fly Me is a pretty wild example of an exploitation 'B' movie from the 1970s.
You can download this clip right here.