Hear Today, Gone Tomorrow/Double Whammy/Autopsy Turvy - S1-E13
Continuity mistake: Hear Today, Gone Tomorrow: When Flippy swings the spiked log into Lumpy's trailer, it puts a huge hole in the wall where the window was. Then, when Lumpy picks up the party hat, the wall is intact with the window still there; then it reverts in the next shot. Additionally, the cake suddenly appears on the table when Lumpy puts on the party hat. (00:06:09)