Serpentine, Sheldon! Serpentine!
I love that line.
I saw this in the theater when it came out. I was 18. I have 2 younger brothers. One of them was obsessed with football at about the time this came out. I remember him running in wavy patterns all around our yard saying, "Look, Cindy! I'm running football style. This is football style!"
I laughed out loud in the movie when Falk's character tells Sheldon to serpentine. Then Arkin runs around like my brother did in our back yard. Hilarious.