The death of Stacy Title brought the film The Last Supper into my mind for the first time in ages, and I went "oh yeah, that's where Linda Fiorentino fucks some people at a dinner party or something". Except it wasn't, that was The Last Seduction. Having never watched either, my brain has for 25 years fused those two films (where Fiorentino does the "skin flick meets classic noir deal", and where Cameron Diaz and friends murder right-wingers at a series of dinner parties) into one.
This happens a lot, so please share examples of you turning two pieces of pop cultural debris into one here. You don't need to do "Bill Pullman/Bill Paxton" confusions, those are given.