This happened like five years ago in a Michigan vs Michigan State game and it was called incorrectly on the field. Michigan is driving down the field. On a passing play the quarterback throws the ball high. Receiver jumps in the air to catch the ball. While in the air, catches the ball. Coming down, still has not touched the field of play, he kicks the pylon. Feet land out of bounds. On the field it was ruled a touchdown, it should have been ruled incomplete pass. That is what they mean that the pylon is out of bounds.