People who climb a rock by bicycle or jump over a river

With balanced sense of balance this does not go. It seems to be flying far and farther than normal jumping with a foot, but what about the physical abilities of these people?

Playback is from the following.
I climb the rock with a bicycle. I wonder if it is loaded with a gyroscope, I do not fall as long as I think.
YouTube - Dave Marshall TartyBikes Trials Promo


I jump over the river by bicycle, I go down the stairway helicopter to the bottom.
YouTube - trial bike