"NO." Sweetie Giraffe shouted at the cliff that towered above her. "I AM TALLEST!"
Her eyes steadily grew redder, before firing off a laser at the cliff. Nothing happened.
She turned around, firing her laser eyes at a nearby puny wimp of a tree. Said tree proceeded to burst into flames because wood is a very flammable material and lasers are very hot.
Turning back to the cliff, Sweetie Giraffe fired another volley of eye lasers at the rock, succeeding only in breaking loose a few small rocks. It seemed that her eye lasers (and height) were no match for this... this tall thing. Slowly, the tall filly bowed her head, honoring her new rival.
And then she proceeded to climb the cliff and stand on top of it so that she could be above it and feel taller again.