Boeing 747 wing flex during turbulence.......

[Justdroppedin]

https://thumbs.gfycat.com/SophisticatedRigidClumber-size_restricted.gif

[Gates07]

scarry, well all know that to break a piece of metal is to constantly wiggle it back and forth and it will eventually break, oopps there goes an engine, now what?

[wolleysegap]

shut the fuel off for that engine no engine no fire enjoy rest of the flight........( our father who art in heaven)

[dogdayz]

Those wings are designed to act like a spring, they would have to bend over 45 degrees before failing.