- Um... I'm not going to be able to continue this conversation.
- Why?
- I could lose my job.
- Okay.

— Prof. Kenneth Monnitoff (Noah Wyle)

16 seconds sound clip from the Donnie Darko movie soundboard.

You can hear this line at 01:13:55 in the Blu-ray version of the movie.

Quote context

[...]

- I'm not following you.

- Every living thing follows along a set path. And if you could see your path or channel then you could see into the future, right? Like, uh, that's a form of time travel.

- Well, you're contradicting yourself.

- If we were able to see our destinies manifest themselves visually, then we would be given a choice to betray our chosen destinies. And the mere fact that this choice exists would make all pre-formed destiny come to an end.

- Not if you travel within God's channel.

- Um... I'm not going to be able to continue this conversation.

- Why?

- I could lose my job.

- Okay.

- It gives me no pleasure to deny you the right to read one of the great writers of the 20th century...

- But, alas, I have not yet been elected queen of the universe, so, I must obey the rules, and so will you.

- So, anyone seen in this school reading this book will be suspended, but not to worry. Someone has already pre-ordered a dozen copies at the Sarasota Mall bookstore.

- In Mr. Greene's absence, we will now be reading another classic... Watership Down by Richard Adams.

[...]