just ran across this off google. Crazy. i thought those runways would crumble under the weight of a 747.

http://www.sa-transport.co.za/aircra...ision/747.html

looks like they had less then a foot on each side of their tires till the grass.

Yep... thats why your instructor keeps yelling "CENTERLINE!!! CENTERLINE!!" the entire time on final.

Seemed to help them tremendously!