These are more color changes in Spongebob.

Rule of Dumb-When Spongebob says "That your King!" His right tooth turns the color of his mouth for a frame.

Mermaid Man and Barnacle Boy-When the old people leave, the bottom of the old womans cane changes color for a frame or two.

Plankton!-When Spongebob runs into his pants, his tie turns black

Doing Time-When Mrs.Puff is being escorted to jail, her hat changes color.