Paul Rudd fainted in an airplane bathroom and woke up in the worst position imaginable

Paul Rudd may have the face of a man who hasn't aged a bit in three decades, but his body is just as human as yours or mine. 

The Avengers: Endgame star told Jimmy Fallon about the time he fainted on a plane the first time he flew to Hong Kong. Rudd had two bowls of soup before going to the loo. 

"As I was getting ready to go to the bathroom, I started feeling really dizzy. I remember there was a handle and I went to reach for it and I was like, 'woah' and then I just blacked out," explained Rudd.

"And the next thing I knew, somebody was banging on the door and my right arm was completely submerged in the toilet and my left hand was around my penis," he said. 

Turns out Rudd was having an allergic reaction to MSG — monosodium glutamate, an ingredient in processed foods.