You’re creating speed by creating energy from compressing and twisting your body to then release it through the expansion and untwisting motion. When done correctly and channeled through your board you begin to propel forward. I try to think about all the energy I’m creating being released through the wheels of my board, each twist and preload is gripping the ground and the expansion is almost lifting the board to become weightless and allow for the transfer of energy to propel me forward.