The platter will slow down and a belt, thread, tape or rim drive, would slingshot the paltter up to momentary over speed once the high stylus drag reduces.
Thats funny.
My TT platter is 26kg, that you would think that immediately after Horowitz has banged out a C1 fortissimo on his Steinway, that the 26kg platter would suddenly take off into overshoot like your direct drive software going wonky is fanciful.