Jay Leno tells jokes about his illness

According to a People.com article, Jay Leno didn't disclose what the mystery illness was that sent him to the hospital during tonight's monologue -- but he did joke about his brief sick leave. "What happened was -- and I think this was a mistake -- I ate a raw pig a friend brought back from Mexico," said Leno.

He also took a poke at the man who will be taking over "The Tonight Show" next month. "Have you ever slept in a hospital? I spent the night. I was there for 24 hours," he said. "I had a horrible dream that I couldn't breathe. I felt like I was suffocating. Then I woke up and realized Conan was holding a pillow over my face."