interesting topic...i'm feeling a bit queezy now.

my dad gets it all the time if he isnt driving.

me...i only get sick on the teacups at disneyland

I never get it riding in a car no matter how crazy the driver is, but when riding as a passenger in an airplane doing aerobatics, I have felt the onset of a queazy stomach after about 10 minutes. If I am at the controls for some of aerobatics, I seem to do better. I have never felt queasiness as pilot in command or as a passenger in non acro flight even in bad turbulence. That said..... if I ever get my aerobatic pane built, I will likely experience it again after a long practice session. I have been told by experienced aerobatic pilots that it takes time to build up tolerance and so long as one stays current with frequent practice, the motion sickness stays away for most aerobatic pilots.