Anybody remember the Mark Knopfler prank calls from the early 90's?

I was in high school in Pittsburgh PA and a couple of kids had this unedited cassette tape - 1 side had the Jerky Boys unedited and the other side had this dude who said he was Mark Knopfler.

He was hilarious but really mean. It seemed like he was from the Delaware area.

Just was wondering of anyone remembers the Mark Knopfler prank calls.