What movie “joke” have you only just got/understood?

30 years since Mrs Doubtfire came out, countless times I’ve seen it on TV over the years, and only now have I realised that the line Robin says when he throws the remote into the fish tank is “the only thing you’ll be watching is deep sea-NN”, as a pun on CNN. No idea what I thought he was actually saying, but just twigged now the CNN reference.

In my defence I’m from the UK so CNN isn’t a big thing over here, but even so…