Prince Harry breaks major royal protocol as he's caught swearing and screaming on video

Prince Harry and Jimmy Fallon had a frightful adventure in a haunted maze in New York City , with the Duke screaming throughout the entire three minutes and 27 seconds. The Prince managed to squeeze in seven events in 72 hours during his Manhattan visit, including this Halloween-themed escapade.

In the video clip, Harry - who recently celebrated his birthday and got a shock message from estranged relatives Prince William and Kate Middleton - couldn't help but exclaim, "Jesus, ----," when startled by a zombie on Jimmy Fallon's late-night show. Instead of the usual sit-down interview, Harry participated in a Halloween-themed skit at the Rockefeller Center.

The royal was so shocked during the haunted walk that he let out a curse word. In a funny turn of events, an actress playing a zombie didn't recognize the prince and asked her colleague, "Who was that? " after he walked past.

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The dynamic duo navigated their way through the haunted house, bumping into a friend, or at least, a lookalike, with Harry saying, "Is that Michael Buble? Good job, buddy."

After being scared by an actor who suddenly appeared behind him, Harry playfully pretended to throw a punch, reports the Express US .

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The maze's website describes the experience as being like "no other," and is set-up at the famous Rockefeller Center for a limited time. As part of Jimmy Fallon's Tonightmares! segment, the haunted maze, similar to a haunted house, consists of "ten spine-chilling rooms that bring Jimmy's nightmares to life."

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The official description states: "As you venture through each meticulously crafted area, prepare to encounter an array of sinister characters - run from a deranged and diabolical mad scientist, malfunctioning murder robots, a terrifying werewolf, and other nightmarish creatures.

"Each room is more horrifying than the last, with unnerving surprises lurking around every corner."

Prince Harry, who has been in New York City for the past week, attending to his patronages and charity work, including Travalyst and the Archewell Foundation's Parents Network, stopped by The Jimmy Fallon Show. During his talk show appearances, Harry revealed that meeting Meghan Markle made him realize he needed to "up his game."