By Siddhartha Vaidyanathan Of the 12 sixes Chris Gayle hit at the CAA Centre on Monday, during the course of his 54-ball 122, only two stayed within the arena. The ten others soared over the stands and disappeared from sight – threatening parked cars, bystanders, security personnel, and the food in the stalls outside. Balls vanished into trees and bushes, and the umpires needed to call for replacements. It will come for no surprise if, during Gayle’s next innings, ball boys are stationed outside the arena. If not, Gayle may…