Taylow Dinerman discusses Stephen Hawking's Zero-G flight yesterday in the Wall Street Journal' editorial page.
On Earth, taking care of someone with Lou Gehrig's disease, or amyotrophic lateral sclerosis (ALS), requires constantly moving the person into and out of a wheelchair. Simple bathroom functions are a major chore for both the patient and caregiver. Deep-tissue massage is needed every day. All of these functions could be handled more easily and with greater dignity for all involved if gravity were not a factor.
I hope you had a blast, Dr. Hawking.