When Kermit and Gonzo, dressed as Sherlock and Watson, go over to Summer to question her about the purple paint, Potato is lying on the ground. However, while they're talking to her, Potato is seen upright in the background, only to fall over for a gag.
As Gonzo and Kermit, dressed as Sherlock and Watson, talk to the different suspects, Potato is always seen upright and then falling down as part of a running gag - even though no one has set him upright any of the previous times.