You pay good money for your ticket - what ever it may be - football, rugby, cricket, showjumping, whatever ... down comes the first sprinkle of rain, and ... bang! You're stuck with someone's sodding Golf Umbrella in your face.
It's only bloody water falling out of the sky, not nitric acid. Buy a waterproof jacket for heavens sake or just dig in to enjoy a nice drop of British weather and get wet!
Okay, rant over ...