When the dad is driving and the kid is complaining about the ice cream cone, they hit a bump, causing the ice cream cone to get knocked out of the kid's hand. The cone lands on the lawn chair with a playing card next to it. Two shots later, the card is gone.
Patrick tells "Smelly" that Squidward hates pets; however in "The Great Snail Race", Squidward had a pet snail named Snellie and took great care of her.