Hot like snow

Not sure if it's related to the terribly hot weather today but I almost fainted while I was shopping for groceries. It felt this intense force pressing on my head and suddenly I couldn't stand straight. My right knee starts to hurt and I can't stop yawning. Must be some bad blood circulation. It's not the first time something like that happened but it never fail to amaze me whenever it happens. I sleep and wake up early, drink lots of water and still my health condition is so terrible. I guess I really need to pick up tennis again or at least Wii tennis. Who wants to play with me?

Talking about heat..Isn't it amazing that F1 drivers can withstand the 50'c to 60'c heat in the cockpit?