Before we start on the content, can you see where there should be at least one comma in your post?
Is that person a gymnast?
A person runs towards the wall and puts his hands on the wall and crosses three wall in succession in upside down position (while touching them with his hands).
A person runs towards the wall and puts his hands on the wall and crosses three wall in succession in upside down position (while touching them with his hands).
A person comes running puts his hands on the wall and crosses three wall in succession in upside down position.
Please check my sentence.
Well, a bird can fly over a wall. As for me, I would rather use the gate.
So where is the comma I suggested that you add?
A freerunner somersaults over three walls in quick succession.
You won't be taking up parkour any time soon then, I guess!