Subtle Jokes You Missed

I rewatch community a lot when I’m bored or, just need something playing, and notice a lot of things I didn’t the first time I watched the series. Yesterday, I was watching the S4 E6, the Changnesia, episodes. Every time they mentioned the trout farm, they would say it was “suspicious” and other words like that instead of saying it seemed “fishy.” Which is the obvious joke there, but they dance around using it when you think they will. Which in turn is the joke and I don’t know why but it was making me laugh. Made me think what other subtle jokes I still miss even after watching the show 6 times.