Can understand stationary turret and moving hull like the Japanese and German demonstrations but turret on the move with the tank? Unless the friction between the surfaces are THAT significant, I reckon no glass of water is staying put without some adhesive assistance. Sorry, I know the 99A is good and all and has a stabilisation that can rival the Type 10 and Leopard 2 in this type of demonstration (not particularly difficult by modern tank standards even a T72 could manage) but accelerating it is impossible.