In the cold open Hal chases a sandwich while crawling face down. Lois sees him lying face up under the car. Next shot he is face down.
Hal describes the vasectomy process to a couple at the bar. When Hal says the first CHOP! The woman has the glass raised to her lips. Change camera and the glass is on the bar.
In the cold open Hal chases a sandwich on a plate while crawling face down. The sandwich falls to the ground yet miraculously stays on the plate.