“Last season I interviewed Louis van Gaal a few weeks before he celebrated the Dutch title with AZ Alkmaar and it became very interesting when we started talking about the prospect of technical aids in football. In the previous game, AZ had a goal disallowed for offside and we both agreed that the decision was debatable. The scorer of the AZ goal was level with the stomach of a defender, who was lying prostrate with his head near the goal-line and his feet in the direction of the penalty spot. We both wondered which body part exactly constitutes offside and which makes it level.” (ESPN)