Sidewinding
Sidewinding is done by simply lifting all the segments with the same slope off the ground. In the movement, the snake's body is always in static (as opposed to sliding) contact with the ground.  The head seems to be "thrown" forward, and the body follows, being lifted from the prior position and moved forward to lie on the ground ahead of where it was originally.  Meanwhile, the head is being thrown forward again.  In this way, the snake slowly progresses at an angle, leaving a series of mostly straight, J-shaped tracks.  Because the  snake's body is in static contact with the ground, imprints of the belly scales can be seen in the tracks, and each track is almost exactly as long as the snake.