Turns out "Tonight Show" host Jimmy Fallon didn't know what exactly he had gotten himself into when the comedian agreed to Rahm Emanuel's dare that he participate in Chicago's Polar Plunge benefiting the Special Olympics.
But with the experience now behind him, he said Monday he feels "happy to be alive" and convinced he'll never dive into an icy Lake Michigan again.
(Take a closer look at Fallon post-plunge below.)
"Chicago didn't let me fool around. They didn't fool around this time," Fallon said of the experience on his Monday night show. "They had like a blizzard the night before, it's like 9 degrees, I think the water was 30 degrees or something. It's insane."
Fallon added that he heard bagpipes when he emerged from the lake, causing him to momentarily fear "it was the end."
The mayor proclaimed the month of March to be "Tonight Show Starring Jimmy Fallon Month" in Chicago as a thank you for Fallon's plunge.
Fallon's participation in the plunge -- alongside Emanuel and the Detroit Lions' Israel Idonije -- raised the profile of the charity event and helped Special Olympics Chicago hit a new record level of donations from the event: $937,000 as of Monday evening. Online donations are still being accepted online toward the organization's $1 million fundraising goal, which would mark more than a $200,000 improvement over the funds raised last year.
EARLIER ON HUFFPOST:
THE spot for your favorite fan theories and the best Netflix recs. Learn more