Read this strip at gocomics.com.
We've returned to the subject of Snoopy's amazing ears. Lucy's reaction is interesting. Increasingly we're getting a sense that the Van Pelt kids, for whatever reason, have their own ways of seeing the world that is different from the other kids. Linus is able to stack blocks in strange and physics-defying ways, and Lucy seems to have secret knowledge about the gravity-defying properties of grape (or, more likely, artificial grape flavoring).
One could attribute this to their youth. And indeed the other young member of the cast, Schroeder, also exhibits a unique psychological property -- he's a musical prodigy. Youth, in Peanuts, seems like it may be a quality tied with genius. This doesn't last forever however; to my memory, Sally doesn't really seem to ever exhibit these kinds of abilities.
Snoopy seems to be really pleased with himself concerning his trick now.
