Veteran Hollywood action star Arnold Schwarzenegger was spotted last week wearing a medical walking boot, and the Predator actor went on talk show The Tonight Show Starring Jimmy Fallon on Wednesday to explain why.

Speaking to Jimmy, Arnold joked, “Just a little pedicure mishap,” before explaining, “I ran too long, too far, too much bicycling, too much squatting, too much whatever. I haven’t been this swollen since the time I was pregnant in Junior,” referencing his 1994 movie, in which he plays a man who gets pregnant — therefore getting swollen feet.

Arnold will soon be taking on his role as President Elect Donald Trump’s successor as host on the shoe The New Celebrity Apprentice.