What's up with Bill Cosby? Who knows! He showed up on last night's episode of The Tonight Show in a Taz-like whirlwind (impressive for a 77-year-old), and Jimmy Fallon barely got a word in edgewise. This was Cosby's opening monologue:

"We're here! We're here on the Fallon show and we're waiting for the gas pedal and the clutch and the break...Too many people have hit the deer, and the deer always win. But the ones I don't understand, I don't understand the intelligence of a moth."

He went on to take Fallon to task for imitating him, briefly discuss pigeons, and describe sex as a septuagenarian.

He also did this:

Watch Bill Cosby's Out-of-Control Fallon Appearance

Never again did he mention the moth. I don't understand what Bill Cosby doesn't understand about the intelligence of a moth.