Oh. My. God. Luckily, Alonso walks from that. If you wondered how is that possible, check the video below that explains the F1 chassis.
F1 gets (rightly) criticized for its excesses. However, you have to give credit where due. That incident may have been avoided if F1 didn't exist. However, the fact that Alonso walked away from that crash is a result of engineers solving a problem that was brought about by the constraints of those excesses. A tip of the hat for that.