I wouldn't have believed it until I saw it in "Internal Explosions" -- Tyce Bune is hammering Daisy Marie from underneath in cowgirl, when he pauses his thrusts for a second or two and then caught on camera is view of the underside of his cock, pulsating as it pumps a load up into her pussy. He pulls out and lets some of it run out, then sticks it back in with no apparent break. Later on in reverse cowgirl, he's pounding away and the same thing happens -- pauses for a second, then you see his cock pump several times before she pulls it out (with the last micro-spurts still firing), they wait for the dripping to stop, and then he sticks it back in and pounds her some more (you can actually hear her pussy full of cum). Finally, he's pounding her in doggy, when he says he's going to cum again and makes some deliberate thrusts into her to finish off the performance.
Impressive stuff -- what's hotter than a creampie is the same guy fucking the girl afterwards, with his cum all over his cock as he pounds away at her pussy. And what's more impressive than that is repeating the feat without a break... cum several times in her and then pound it in, just to be sure plenty of seeds are planted nice and deep.