The teacher is conducting vocabulary lessons.

"Today's word is 'frugal'. Does anyone know what it means?"
Silence... "Well, it means 'saving'. Johnny, can you tell up how it can be used?"

Johnny thinks for a minute.. "Um, a famous knight was riding out one day when he saw a maiden being attacked by a dragon!
She saw him and cried out "Frugal me! Frugal me!".. so he killed the dragon and frugaled her, and they lived happily ever after!"