DETROIT -

Bill Cosby appeared on the 'Tonight Show' last night, and it was so much fun.

Cosby, who recently turned 77, has been touring the country on a new stand up tour, and made a quick stop to see Jimmy Fallon. Fallon is known to do impressions, including a great Bill Cosby. Watch below as Bill confronts Jimmy (or James, as Bill calls him) about his impressions.

If that wasn't enough for you, Bill wasn't done! Bill briefly discussed pigeons, moths and his birthday celebration with his wife, which included details none of us needed to know!

The main lesson in all of this: Bill Cosby is only getting funnier. Scary thought.