I had a contractor (a particular one that was notoriously a wise ass) call my office one day.

He wanted to me to give him the stationing for his sewer service off of the manhole. He had spent the last several weeks building one of his cookie cutter spec homes and had apparently assumed that the manhole out front was sanitary sewer.

I had the pleasure of letting him know that there was an air relief valve inside that manhole. Hahahaha

The guy was in a panic, I chuckled at I hung up the phone. Went and shared that with a couple of my civils. Got a high five from the chief for the laughs.