It was when he was teaching grade school children to snort cocaine, and he was notified that an Airliner had crashed into one of the Twin Towers. He picked up a pretzel instead of the hotline phone, and tried to swallow it whole, causing him to choke, which led to him not responding to the situation on 9/11 instantly.
At least that's what I read in the New York Times. Or what I remember.
I like your sense of humor.