Baking Soda Volcanoes

Doofenshmirtz explains that in the past that when he tried entering a science fair with his first "Inator", he lost to baking soda volcano. He tried against in the next year with a bigger Inator, and lost again to baking soda volcano. He decided to give up on science fairs so he try his hand at poetry, but still lost a poetry contest to someone who made a baking soda volcano! So he decided to enter another science fair, this time with his self-proclaimed "world's largest baking soda volcano" to get back at all the times that he lost. During The Stinger, after Doof gets transported to Mars at the end of the former segment, the Martians walk up to him as if they are going to make him King of their planet (similar to how Candace becomes the Queen of Mars in the latter segment), but they end up giving the crown to a baking soda volcano, much to his chagrin.

Example of:
Always Someone Better