Celebrities surprising fans is a subgenre of late night TV that'll probably never get old.
Latest to take up the gauntlet is Dwayne Johnson, who along with Tonight Show host Jimmy Fallon visits the FAO Schwarz toy store in New York, pretends to be a large robot, and then pops out to surprise the customers in the video above.
If you need some wholesome festive viewing, it's just the ticket.
