Safest way to travel - you've got more chance of dying on the journey to the airport.
Deep breathes, close your eyes and you'll be OK. However, if you like rollercoasters etc you'll be fine.
And at the end of the flight take you shoes and socks of and scrunch your toes into balls...of course just make sure you aren't near the top floor of a Japanese company's skyscraper while there's a party going on...yippee kiyeah melon farmer.
Even kiddie roller-coasters make me ill.