I had never heard of glioblastoma and had to look it up.
As for flying... as you may know from many of the posts between Steve and I - I love flying. Not sure there is any activity I like more. I get as peeved as everyone else about the hassles TOO fly... check-ins, cost, layovers, bad food.... BUT... once in the air I'm in heaven. I'm that guy with his nose pressed against the window for the entire flight... and I mean ANY flight, even 11 hour flights. I can't really explain it but watching the earth from above is a euphoric drug for me... I am SO fascinated, enamored, mesmerized by flying over the earth that all else in life fades away. - JamesJM