Jimmy Fallon invited The Rock onto "The Tonight Show" to promote The Brahma Bull’s new movie, "Fate of the Furious," and ended up stuck in a phone booth with a WWE Superstar. Allow us to explain.

Fallon and The Rock were playing a game called “Phone Booth” in which they enter separate phone booths and answer trivia questions. If they get a question right, someone enters the opposing phone booth. If they get it wrong, someone steps into their booth.

After The Rock correctly answered a question, Fallon was shocked to see the very first person squeezing into his phone booth was none other than The World's Largest Athlete, Big Show!

Hilarity ensued as The Blue Man Group and even minions from the film "Despicable Me" crammed into the booth with Fallon and Big Show. Check out the video above from NBC.