i've had a 777 over chicago at 90,000 feet, no glide, lift, or power - just
free falling to earth like a skydiver. - and i couldn't regain control

the fun of FS04 on a rainy day

You may or may not be able to regain controlled of
the aircraft and resume normal powered flight after you've returned to a
lower altitude. It's tricky because at high altitudes you have
virtually no control over how an aircraft behaves (none of the control
surfaces really work), and you may go spinning uncontrollably back
towards the ground. In the right kind of aircraft with a competent
pilot, though, it is possible to regain control and return safely.