I agree with Tmmorris,
I spewed up when my instructor had me trying to draw an inflight diversion on the map.. I wasn't right for 2 day's after that
I think its something to do with when your looking at a fixed object then looking up out of the window..
I also get it when i read a magazine in a car and then look up..
Never when it's actually me doing the flying or the driving tho..
My misses also spewed when i was pressuring her into trying to spot the field we was landing at
T6