Tom Felton is best known for portraying Darco Malfoy in the “Harry Potter” film series. Still, despite his character’s demeanor in the movies, the actor was terrified after an on-set accident.

In a video posted on his official Instagram account to promote his memoir “Beyond the Wand: The Magic and Mayhem of Growing Up a Wizard,” he was chastised by the late Alan Rickman while filming a scene for “Harry Potter and the Half-Blood Prince.”

On set, the actor inadvertently stepped on the legend’s black cloak, prompting Rickman to retort:

“Don’t step on my f****** cloak.”

He laughed it off at first because he thought the late actor was joking at the time until he realized he wasn’t. He said Rickman was “terrifying in the most pleasant way.”

Despite his fears, production had to continue filming, and he became more cautious about where he put his foot.

The accident occurred after the director instructed him to walk as close to the actor as possible. The cloak was attached to Rickman’s neck, and Felton “nearly killed the poor man” near the Great Hall.

Someone else stepped on the actor’s long black cloak while filming the scene again, and Felton felt relieved because it took the heat off of him.

Alan Rickman died in 2016 in London, United Kingdom, at 69. He was reportedly surrounded by family and friends when he died. The legend passed away as a result of cancer.

His recollections of working on the “Harry Potter” franchise are making the rounds online and in the news, according to the outlet, after some parts of his diary have been compiled and are set to be released as a book titled “Madly, Deeply: The Diaries of Alan Rickman” on October 18.

He recalled filming one scene of “Harry Potter and the Goblet of Fire” for two days without doing anything except standing very still, applauding twice, and watching the other actors dance in one section of the book.

Tom Felton’s book, on the other hand, is set to be released on October 13 and will discuss his life on the big screen and with his family.