I see it now. A future episode that centers on Morty going to the store to buy some Ketchup. As he rides his bicycle, he tries to jump a curb, but ends up popping the inner-tube in his tire. So in addition to the grocery store, he now has to find a bike shop/hardware store that sells new ones. Eventually he settles for a K-Mart style that sells them, but they also sell all kinds of neat toys and gadgets in the electronics section that he has to pass in order to get to the inner-tubes. He sees a video camera that uses filters to distort what you're videoing, so decides to buy that also. But he realizes that he doesn't have enough money for everything, but a strange guy at the store has a proposition for him. Que the zany antics, and right as the credits role, Morty makes his way back home only to be pissed off that he forgot the ketchup.
What an awesome show that would be.