According to Osho, you don’t “forget” your Buddhahood—you simply haven’t remembered it existentially. When it is truly remembered, forgetting is impossible, like forgetting you’re alive. Until then, any “spontaneity” is just impetuous, an intellectual, reactive surge. Real spontaneity flowers only from the irreversible remembrance of your buddha-nature, where action arises naturally, effortlessly, and cannot be lost.
You act truly natural only when you deeply know you’re already a Buddha; until then, quick moves are just hasty reactions.