"Mortimer Schnerd, RN" mschnerdatcarolina.rr.com wrote

I don't think it had anything to do with me taking the controls. I think it
was the end of the aerobatics (and the adrenalin rush) that caused it. I have
a mental image of fluid swishing around the semicircular canals in my inner
ear during the aerobatics, but at least it agreed with what was happening.
Then we were straight and level, but the fluid was still swishing around. The
incongruity caused the nausea.

At least that's my theory. It may just be so much crap.+++++++++++++++----

Could be. Here's another one.

I was sailboating (25 footer) on the Western end of Lake Erie. Less then 18 feet
deep, in most places. Dad and me with the rest of the family along, on our
first year with the boat.

A sudden squall line blew up, with winds clocked at over 60 knots, and that was
on land, and before it got to us. We were too far from land to get to shelter
in time. Waves, we estimated, were greater than 12 feet, with not more than 50
feet, crest to crest. Very steep waves, indeed. We only had limited choices
with our sails (no storm jib, and only a single reef point on the main) and soon
the motor was not enough to keep us into wind, quartering the waves, even with
just bare poles. The only option was to throw out the anchor, with 100 feet of
line. It held, and surprisingly, it did not pull the cleats out of the bow.
O'Day makes one tough little boat, we decided after that!

Side note to the people that like sailing. Immediately after this experience,
we had two more reef points put into the main sail, and purchased a 30% jib, and
a sea anchor. The sea anchor is basically a parachute for the water, to keep
the boat correctly oriented with the wind, as it blows along with the storm.

I have never been sick from motion, before this. Everyone on the boat was sick
as a dog, except for my brother. He sat and concentrated on the horizon, and
willed himself to not get sick.

He didn't. Almost.

When the storm finally slacked off, the waves went back down to two to three
footers again, just as quickly as they came up. We got underway, and he finally
relaxed, and stopped concentrating on the self control, and you guessed it. He
finally lost his lunch.

My theory is that it all goes back to will controlling the sensations. While
you were doing the acro, you were no doubt concentrating on not being sick.
Afterward, you relaxed, and the disorientation done before finally did it's
work.

That's my story, and I'm sticking to it!
--
Jim in NC