If you remember some of the stuff he did on air at Y107 in the "early days", this extremely odd press release announcing his new position under Sam Zell at Tribune should come as no surprise. I think he wrote it himself.
http://www.tribune.com/pressroom/releases/2008/04072008.html
If memory serves me right (it must have been 20 or so years ago) and I am not giving Marc credit for someone else's bit, I recall a particular afternoon where he got in a shouting match with someone from the FCC involving some sort of obscenity that today we would not even bat an eye at. The FCC guy (I am assuming this was completely fake but funny anyway) said if he said the word again, they were going off the air for 15 minutes. He did and the station went to silence for the 15 minutes.
http://www.tribune.com/pressroom/releases/2008/04072008.html
If memory serves me right (it must have been 20 or so years ago) and I am not giving Marc credit for someone else's bit, I recall a particular afternoon where he got in a shouting match with someone from the FCC involving some sort of obscenity that today we would not even bat an eye at. The FCC guy (I am assuming this was completely fake but funny anyway) said if he said the word again, they were going off the air for 15 minutes. He did and the station went to silence for the 15 minutes.