Thinking About Not Thinking...

In "Roller Coaster Dragon" from "Dragon Tales," Wheezie really wants to ride the roller coaster dragon and doesn't feel like she can wait in line any longer. She decides to try not think about it, but chanting that she's not, but as she quickly realizes, this is just a surefire away to end up thinking about it.

Example of:
Thought-Aversion Failure