and it could be just that Im missing something, but...

okay Vader starts the fire, drags Obi through it, then he uses the force to put it out right? But then when the explosion happens and the fire is between them again, why doesnt he just put it out again with the force instead of allowing the droid to escape with him? Or was he just toying with his prey like a cat letting a mouse go since he did say "your suffering's only beginning"?

Or maybe Im missing something. Again thats a miniscule grape in an other wise AMAZING ep.