You could be right, but then again, it's most likely a deliberate attempt on Cimino's part throwing in his subtextual references! My theory on what happened is, Lightfoot, with his lightning-quick speed, snatched the bra from Gloria and put it on himself, being....uh....(you know

). And later it also came in handy for the heist scene. Yeah, that must be it! Unless someone has any better theories....