Thank you, sir, but I fear inebriation may cause me to forget my manners in such fine company.
10 seconds sound clip from the Almost Heroes (1998) movie soundboard.
You can hear this line at 00:07:53 in the Blu-ray version of the movie.
Quote context
[...]
- I'd be more worried about the Indians than the bears.
- Have you witnessed such atrocities?
- You look like a man who appreciates good whiskey.
- Thank you, sir, but I fear inebriation may cause me to forget my manners in such fine company.
- Good god, man, I'm not talking about getting blind drunk. I just meant for you to have a taste.
- Well, then... a taste it shall be.
- How about you get your own bottle?
[...]