If one player scoops a pot which is bigger than some threshold (say $50 in a 4/8 game) the next pot is a kill pot and played at double the stakes (4/8 game -> 8/16), and the player who won the kill pot puts in a forced bet of double the big blind (would post $8 in the 4/8 game) - if it is a live kill then that player acts last preflop. The blinds remain the same, but must complete to the new higher stake to play. A half kill works the same way, only game goes to %50 higher instead of double (4/8 game goes to 6/12).