I'm supposed to know what you're talkin' about?
4 seconds sound clip from the The A-Team - The Out Of Towners (Season 1, Ep. 8) TV Series.
You can hear this line at 00:27:43 in the DVD version of the movie.
Quote context
[...]
- It's the blind guy from the TV shop on Delancey.
- I believe we have some business to attend.
- Hey, Pops, would you leave Mr. Struthers alone, okay?
- I'm supposed to know what you're talkin' about?
- He doesn't know what you're talking about, Uncle.
- We did not come here to drink.
[...]