Lol, Evil, yes, that might be true! Snickers is quite the macho man!
And the mystery of his "gaiting" might as well be solved - I told this to one of my more experienced barnmates and she said it might mean that he managed to collect naturally at that moment - really engaging his hindquarters, lifting his shoulders and rounding his back. That would explain increasing in the impulsion and the gait becoming smoother - carrying the weight of the rider correctly.
Well, I sure hope her guess is right. :)