When life hands you lemons, make lemonade. When life hands you rain on your track day, do as these Scandinavian enthusiasts did and make it a drift day.
You can put on your best straight face and make the case that sliding around in the wet is a great way to learn at-the-limit car control, especially with modern computer-managed beasts like the V-10 BMWs and the GT-R. We can sort of accept that with the tail-out slides. Try explaining away all those silly donuts, though. Yeah, we see you smiling.
(Hat tip to Hannes Danielsson!)