I have nearly crowd surfed at every concert except of course any concert where I am in the lawn because I would not get far or a country concert because it isn't the right concert. Crowd surfing is something my mom doesn't approve but it's a must when at concerts. Crowd surfing is rather easy. Your body becomes a free body diagram. There are forces such as mg, and the force of the people holding you up. I get the help of two bodies with a mass greater than mine because I know they will be able to support me. When crowd surfing you can either go forwards or backwards so that also shows the direction the forces will have.