Impossible Stuff with the Human Body

Here: https://www.youtube.com/watch?v=xXKPwAPNeqY One of these guys folds his body backwards in full, like our bones shouldn't really allow for that, so what is going on there? Is it possible that you can get that from using these head bugs? Another one does the splits with a moving car and doesn't fear anything, like what is going on there, the car could definitely have moved quicker than she expected or planned. Oh! Another guy looks like a kangaroo or worse: he jumps as if he is walking heights that are unbelievable. Only if you watch you will believe! May God bless.