Panel 1: For some reason, Gordon shows up and uses hick-speak to ask Mike to put the new car in gear so he can hear the engine. This is not something that's a thing but is useful for setting up the stupid punchline.
Panel 2: Limp-wristed Idiot Mike's feeble objections go unheard because Gordo boasts about having only two lessons left before he takes his driver's test as he starts the car.
Panel 3: We see Elly doing the dishes starting to say that she can't be hearing what she's hearing.
Panel 4: Sadly, she is hearing what she's hearing: a nincompoop and a coward driving her new car down the driveway.
Summary: This could all have been avoided if John and Elly had told Mike "If someone who isn't us asks you to do something stupid, say no."