Seriously, the dog is incapable of rolling on his back without sneezing. He's typically laying on his back to try and get his tummy rubbed, at which point he will usually sneeze in the face of the innocent person who tried to help him out. Even if no one is around he'll sneeze though. Doesn't matter if he's been playing/breathing hard, or is completely relaxed. He sneezes and then won't stop until he turns his head the right-side up. He doesn't appear to enjoy the sneezing, but he'll still lay there on his back for four or five sneezes, typically until he sneezes so hard he falls over and stands up on his own. He hasn't put together the back=sneezing connection yet.
Anyone know what causes this?