Playing Blizzard games in lag is like taking a Cyanide pill. Unfortunately, it never works.

But seriously, I've gotten violently sick from Super Mario 64, the Ice level in the Castle's mirror room, in which the portal is on the back wall, yet unreflected and hidden, and Kingdom Hearts' Wonderland, but not because the level was flipped upside down, but because I had no idea what I was doing, and kept going from the save point to the pink checkered room. Nothing else seems to hurt.

A good solution to your motion sickness is either to play it until you get this feeling where your brain will explode (preferably dark or dim). Go to sleep. Then return while in a very bright setting (open the windows!). From this point on, you shouldn't have any concentration or headache problems. Don't drink milk or soda.