An oscillation builds up in the wing span to the point where the wing self destructs.  Here&#x27;s an video example from the development of the 747:<p><a href="http:&#x2F;&#x2F;www.airspacemag.com&#x2F;videos&#x2F;category&#x2F;flight-today&#x2F;wing-flutter-on-a-747&#x2F;" rel="nofollow">http:&#x2F;&#x2F;www.airspacemag.com&#x2F;videos&#x2F;category&#x2F;flight-today&#x2F;wing...</a>