The 8 ball is neither a solid nor a stripe. This includes all combination shots. Such a shot isn't a scratch, but the shooter loses his or her turn. Scratch on Break Not a loss. Ball in hand in kitchen.
Any pocketed balls stay down.
Sinking 8 Ball on Break Not a win. The other player can spot the 8 ball and shoot from the kitchen or rerack and break. The ball stays down, the cue ball remains where it stops, and the turn is over. You cannot lose without pocketing the 8 or jumping the 8 off of the table. Scratch and sink the 8 ball on the same shot.