Leonard: Now, what is this sacks statistic they put up there?
Howard: All I know about Saks is, my mother shops there.
Leonard: (Thumbing through a guide book) Sacks, sacks
Sheldon: It's football nomenclature for when a quarterback is tackled behind the line of scrimmage.
Leonard: Huh. (Searching the book again) Scrimmage
Sheldon: The line of scrimmage is the imaginary transverse line separating the offense from the defense.