One time in grade 10 science class we were learning about the food chain. The teacher put up a description of a Lion chasing down a Gazelle on the overhead projector and began to read it aloud:

Peering out from the high grass the Lion carefully stalks its prey: a lone Gazelle who has strayed from the others. Slowly the Lion creeps forward…until the Gazelle, hearing something, quickly raises its head upward to spot the lion. After a tense pause the Gazelle breaks away...but the Lion, in close pursuit, quickly narrows the Gap. The Gazelle makes sharp turns, left and right, to elude its predator but each time the feline closes the gap. Finally, the Gazelle's turn is anticipated and falls under the claws and teeth of the Lion who quickly presses its teeth into the Gazelle's neck.

Just as the teacher came to the end, I suddenly shouted out loud, incredulous: Why doesn't the Gazelle just fly away?! Of course, half-way through saying that I recalled that a gazelle was not a large crane-like bird, as I had pictured it for some reason, but actually a massive zebra-like land-animal. The entire class turned to me and simultaneously and, just as incredulously, cried back: 'WWWWHHAAT?!?!!?'

I just slunk down in my chair and answered, 'nevermind'.