During the fake thunderstorm, Floyd would create the thunder before Uncle Joe flashed the lightning. However, because light travels faster than sound, lightning always happens before thunder. Joe should have flashed the lightning before Floyd hit the thunder.
Uncle Joe is reading the letter from the honeymoon couple to Kate and the girls. Bobby Jo is on the far left with her arm resting on the counter looking to the right. Her blouse is bunched a bit creating a small opening between the buttons where part of her bra can be seen. Also when her blouse is seen from the front the buttons are on the right while women's styles are on the left.