What are some instances where you saw something and didn't realize that it was somehow referencing something else, whether it was a parody or satire or just a shout-out to it, likely due to seeing the reference before seeing the thing it was referencing?

I saw the second season of The Facts of Life in 1980, 38 years before watching Little Darlings, which it ripped off heavily. I was totally shocked when I saw LD on YouTube.