Their passengers may get a bit seasick, but we're liable to sink.
It just didn't occur to me earlier Spock might get seasick.
He was dreadfully seasick for five days. This is an awful thing to contemplate.
He was terribly seasick, and so he invented this boat in which you could not be seasick.
My mind continually returns to feeling seasick, I try to banish the thought from my head.