Good lord you're insufferable. Enough of your "durr hurr just google it, a 25 isn't a sprint because it's slow" BS and freakin' realize that it is still a controlled sprint. The 800 is a two-lap sprint. It hurts like a sprint, burns like a sprint, makes you go lactic like a sprint...
Maybe a better title would've been "is 800 a controlled sprint" but my point stands overall