Airplane wings aren't some rigid chunks of metal: in fact, they probably have a bit more flex than you'd expect. This is the behavior of a Boeing 747's wing in a turbulence. It can move 6m up and down safely.
The Boeing 747-400 is the only Heavy
Widebody aircraft that can get up to 45,000 feet. No other aircraft can fly that high weighing this much, not even the newer 747-8 version.
📹: captainsilver747