Party steps out of a barn, and is faced with a war party of orcs.
Mage: *Mumbles arcane words* A ball of fire leaps from his palm, the orcs go up in flame and smoke.
Bard: "Wow that was nice, can you teach me that sometime?"
Mage: "What?"
Bard: "That spell you just cast."
Mage: "I did not cast a spell, at least I do not remember doing such a thing."
Bard: "Yeah, you just blew all those orcs into ashes."
Mage: "I did that, oh my, I need anger management classes."
Bard: "Soooo.... can you teach me that spell?"
Mage: "What spell."
Bard: *Sigh*