The rider sure got off smoothly, no tumbling at all. People sometimes come apart when they tumble in a bike wreck. I had the unfortunate experience of seeing a video where it was the rider who broke in two instead of the bike.
I own a welding shop and weld everything under the sun, I do alot of design fabricate and build, I have to build things with safety factor built into them.
I always crindge when I stop by a friend of mines place who builds drag cars when I see him cut the cross member that is equivelant to a 3" x 5" tube and replace it with 1-5/8" OD chromoly and thats just one of the many areas that they chop out to save weight and I'm not talking 12 second cars, These are cars running down into 7 second quarters.
Racers take all the safety factors out of the equation except for the **** pit bars that are mandated by the racing orginization as to what size, how many and where they have to be located.