Tom: It was actually in the script that Hermione slaps Draco so I said to Emma :Do you want to run this? We should rehearse this, we should make it as convincing as possible. Slap me! She was like: No I’m not gonna slap you. I said: Go on, slap me right now, lets just do this, and while I said slap me, I meant “movie slap” me.

Emma: I felt terrible, I feel really bad, I’m not even sure what I was thinking.

Tom: She just went swish, and slapped me right across the face, which completely took me by… I didn’t know what to do and I kind of walked off sheepishly.