When people take a dose of speed (amphetamine or methamphetamine) orally when they’re tired and take a nap. They eventually get woken up by the effects of the speed and have gotten some rest at the same time, also improving the effects of speed as the user has gotten some rest before being stimulated.
Bob: I’m exhausted but I have a ton of work to do.
Mike: Pop an adderall and take an amphetanap and get the best of both worlds!