Ewan Whosearmy:
What kind of "waiver" would you sign before a trip in a U.S. fast jet?
Another thing (fact): A very large proportion of "unaccustomed" FJ passengers will get sick after 30 - 40 min.s of jet flight. (Can't remember the actual number of minutes).
I've met quite a number of fast jet pilots/aircrew that had to overcome airsickness - (from the bad smell of the rubber oxygen mask,... whatever.)
RAF Institute of Aviation Medicine? - don't they "work" such cases?