Did you manage to find a way out in the end?
I hand a pretty hardcore dream myself where a rabbit man was chasing me down some gorgeous back alleys trying to kill me by over feeding me carrots.
This didn't happen to be your ex?
I had a friend that watched tthatmmovie in his youth and for a long time he stayed away from drains in general in case you know, a clown is chilling out in one of them.