I doubt it cartwheeled in the sense we’d think of it. More than likely the plane came down very hard and either collapsed the right main gear or banked over to the right; for whatever reason it dug in and dragged the right wingtip (that’s the one that is supposedly missing ~7 feet correct?), which skidded the plane around and slid it sideways off the runway, collapsing the landing gear, which isn’t designed to handle the side load of 200 tons of airplane sliding at 100+ knots. It would keep sliding and shear off the engines at that point, and slide to a stop, with a fire probably coming from hot engine parts in contact with spilled fuel through the damaged belly, or electrical sparking, or any number of other things.
}:-)4
Thanks, Moose4. Steve86 explained that it didn’t cartwheel, and you further described what might have happened. It’s unfortunate some people on the news described it that way.