So was it really a case of dehydration? No. It turns out Jay Leno may have been hospitalized last week because of food poisoning after all.

“What happened was — and I think was a mistake — I ate a raw pig a friend brought back from Mexico. ... It was delicious,” he joked last night.

Although a real reason for his sick days - his first since starting the Tonight Show gig in 1992 - was never disclosed, Leno did reveal a scary moment he had during his overnight stay. “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,” Jay claimed.

Check out more videos from his return after the jump.