In the worlds of physics and astronomy, biology and mathematics, technology and medicine, there are myriad topics that are fiendishly difficult to explain. The meaning of life, the laws of general relativity, quantum mechanics, Fermat's last theorem. Head-scratchers all. Here's another one - and without question it's the biggest head-wrecker of the lot. Arguably the most confusing conundrum Hampden has ever thrown up. Arguably. After getting outclassed for an hour and trailing 1-0 when by