Comedian Bill Maher may have bit off more than he can chew with a challenge he issued to Donald Trump.

On Monday night’s “Tonight Show with Jay Leno,” Maher mocked Trump’s offer to President Barack Obama prior to the November election to release his birth certificate in exchange for $5 million donated to the charity of the President’s choice.

Maher, probably jokingly, offered to donate $5 million to the charity of Trump’s choice if he would release his own birth certificate to prove The Donald was not the “spawn of his mother having sex with orangutan…”