We've tightened the security around the school grounds. I'm sure there won't be any more incidents like that.
9 seconds sound clip from the Duel to the Death movie soundboard.
You can hear this line at 00:50:17 in the Blu-ray version of the movie.
Quote context
[...]
- I heard you were attacked at the graveyard. I am so sorry.
- It's very strange. I wonder how they knew we'd be there.
- My father is investigating it.
- Whoever he was, well, you ought to teach him a lesson.
- Oh, yes. He'll live to regret what he has done.
- You saw through my disguise. Was it really so obvious?
- Of course. You move with such grace.
[...]