As one of the stars of AMC's The Walking Dead, Norman Reedus is used to dealing with zombies on set. But he wasn't prepared to come face-to-face with one of them in real life -- which he did when costar Andrew Lincoln and viral Vine prankster Nick Santonastasso pulled off a hilarious (and carefully orchestrated) zombie stunt during one of the hit show's promo stops in Tokyo.

Santonastasso, 17, is a Walking Dead superfan who was born with a rare condition called Hanhart syndrome and has one arm and no legs. He's recently become something of a social media sensation thanks to his "zombie prank" Vines, which involve him painting himself in zombie makeup and then scaring unsuspecting strangers in public. 

As part of Fox International's new social media campaign "#getFOXed," New Jersey native Santonastasso was flown out to Tokyo to pull one of these pranks on Reedus, who plays Daryl Dixon on the AMC smash. His partners-in-crime? Cast member Lincoln (Rick Grimes) and TWD special effects expert Greg Nicotero.

"Norman is gonna kick our asses," Lincoln jokes in a video about the prank, which took place in a hotel room in Tokyo. 

As seen in the clip above, Reedus enters the room prepared to film a promo for The Walking Dead. Once he's alone, Santonastasso emerges from under a room service cart. Reedus' reaction? Priceless.

"Good job, you jerk," he quips afterward.

Watch the entire hilarious prank above!