Movie where a snake comes out of a toilet

This is a weird one, because I'm not even sure where I heard about this. I'm 95% sure I didn't dream this up but I've had this memory since I was around 7 (2001) of some weird movie with a scene where a snake comes out of a toilet. Not entirely sure in what fashion, if someone was nearby to get killed by it or whatever, just got that. I feel like it's something my grandma told me about and I might have seen a clip on TV (which might be why she told me about it?). And I remember something about the movie getting a re-rating. Either it was to do with the introduction of PG-13 or it was like rerated from PG-13 to R I don't know, something like that. I feel like that's what my grandma was telling me about. 

I still don't know if I actually saw anything from this movie or where this memory comes from, but I've tried looking up such a scene before and nothing really seemed to click. This is such a weird one that I probably couldn't even identify the right media if I saw it. I asked my mother about this once recently, but she didn't have any familiarity with such a movie. All I really remember is something about a snake emerging from a toilet and the thing about the movie getting a re-rating. And I'm oddly certain it was a movie.