A seat assembly secured to the floor of an automotive vehicle comprising: a seat cushion ; a seat back pivotally coupled to the seat cushion for movement between a plurality of reclined seating positions and a fold flat position overlying the seat cushion ; a recliner assembly operatively coupled between the seat back and the seat cushion for actuation between a locked condition and an unlocked condition to provide the pivotal movement of the seat back ; a riser assembly pivotally coupled to the seat cushion and adapted to be pivotally latched to the floor for actuation between a latch condition and unlatched condition to allow pivotal movement of the seat cushion between a horizontal seating position and a forwardly upright tumbled position with the seat back in the fold flat position; and a release mechanism operatively coupled between the seat back and the riser assembly for automatically synchronizing actuation of the recliner assembly and the riser assembly to provide movement of the seat assembly to the tumbled position in response to the pivotal movement of the seat back to the fold flat position, the seat assembly further including a seat track assembly operatively coupled between the seat cushion and the riser assembly between a locked and unlocked condition for providing selective fore and aft sliding movement of the seat cushion relative to the riser assembly , the seat assembly being characterized in that the release mechanism is operatively coupled between the seat back and the seat track assembly for automatically synchronizing actuation of the seat track assembly in response to pivotal movement of the seat back to the fold flat position. a seat cushion ; a seat back pivotally coupled to the seat cushion for movement between a plurality of reclined seating positions and a fold flat position overlying the seat cushion ; a recliner assembly operatively coupled between the seat back and the seat cushion for actuation between a locked condition and an unlocked condition to provide the pivotal movement of the seat back ; a riser assembly pivotally coupled to the seat cushion and adapted to be pivotally latched to the floor for actuation between a latch condition and unlatched condition to allow pivotal movement of the seat cushion between a horizontal seating position and a forwardly upright tumbled position with the seat back in the fold flat position; and a release mechanism operatively coupled between the seat back and the riser assembly for automatically synchronizing actuation of the recliner assembly and the riser assembly to provide movement of the seat assembly to the tumbled position in response to the pivotal movement of the seat back to the fold flat position, the seat assembly further including a seat track assembly operatively coupled between the seat cushion and the riser assembly between a locked and unlocked condition for providing selective fore and aft sliding movement of the seat cushion relative to the riser assembly , the seat assembly being characterized in that the release mechanism is operatively coupled between the seat back and the seat track assembly for automatically synchronizing actuation of the seat track assembly in response to pivotal movement of the seat back to the fold flat position. <EOS>