Rutherford was lucky as it appears he hit rear three quarters first rather than head on or squarely side on. Either of the latter two would have been very much worse - possibly fatal. It obviously shredded itself during the subsequent journey along the top wall.
Bourdais's accident reminded my of Kubica's in Canada. That was head on at about 45 degrees to the wall and moved one of the concrete sections used to form the wall. He was very lucky not to lose his feet. In both the car carried on for a good distance losing the remaining energy. In either case, a full stop would have surely been fatal. Interestingly, I think Bourdais suffered a significant injury in his impact (fractured pelvis or leg?) where Kubica got away with no significant injury. Kubica's impact was about 75g so there's a big difference there. Kubica's car also had some time to slow a bit between leaving the track and hitting the wall which would have helped enormously. That's probably what saved Kubica.
Also of interest is how short the nose cone of the Indy car is. After the impact, there's only a small piece missing. In F1, the whole nose cone acts as a crash structure. I wonder whether Bourdais would have fared better with a longer crushable nose cone to absorb some of the energy and reduce the g-loading on him.
Turbo says "Dumpster sounds so much more classy. It's the diamond of the cesspools." oh, and "The Dutch fans are drunk. Maybe"