Whatever you do, don't wake them. They might do real harm to themselves or others.

7 seconds sound clip from the Step Brothers (2008) movie soundboard.

You can hear this line at 01:06:46 in the Blu-ray version of the movie.

Quote context

[...]

- No. But they could do real harm to themselves or others.

- Oh, the Christmas presents.

- No, guys... No, no, don't.

- No. But...

- I think we should take control. It's always about them.

- How do you propose to do that?

- Whatever you do, don't wake them. They might do real harm to themselves or others.

- Not everybody does know that.

- Oh, the Christmas tree!

- All right, that's it! I'm waking them up!

- No! No! Don't wake them up!

[...]