You know, there's something I think you should know... about Mark.

9 seconds sound clip from the Old School movie soundboard.

You can hear this line at 00:56:54 in the Blu-ray version of the movie.

Quote context

[...]

- I made some minor changes, but overall it's okay. It's a pretty standard lease.

- Okay, great. Thank you for taking a look at it for me. This stuff always confuses me.

- Anytime.

- So, you and Mark are moving in together?

- Yeah. Well, financially it makes sense, so...

- You know, there's something I think you should know... about Mark.

- What is it?

- Well... Relationships are a lot of work. And, I guess what I'm saying is... Good luck.

- Oh, okay. Well, thank you.

- Yeah. Listen. I was thinking maybe sometime we could get some dinner or something? If that's okay with you.

- Yeah. I'd like that.

[...]