Mind your footsteps around Snape’s cape.

Tom Feltonis lucky he didn’t get 10 points taken away from Slytherin with this slip-up.

“I sort of giggled.

Alan Rickman and Tom Felton in ‘Harry Potter and the Half-Blood Prince’

Alan Rickman as Severus Snape and Tom Felton as Draco Malfoy in ‘Harry Potter and the Half-Blood Prince’.Everett Collection

The Death Eaters and I looked at each other and thought, ‘Is he joking?’

It quickly became apparent: He’s totally not joking.”

In hindsight, Felton completely understands why Rickman would be upset.

Rickman “turned around and gave me a look you never, ever want to see.”

“That kind of took the heat away from me,” Felton quipped.