in the number the stuck player had reached before getting stuck. After the player completes the circuit from "1" to "12" and successfully flicks into the square labeled "13", a circuit of the four trapezoids surrounding the "13" square must be made. The circuit of these must be performed in succession in a single turn, with the player saying "I" in the first, "am" in the second, "a" in the third, and finally "killer" in the fourth, or a variation, such as "I'm", "a", "killa". If all trapezoids are not negotiated in succession in a single turn, the turn is forfeit and the process must start again on the player's next turn by first flicking for the "13" square. If the trapezoids are successfully negotiated, the player is deemed to be a 'killer'. In another variation of the game, players must complete the circuit of numbers from "1" to "13", then backwards back to "1", before making the attempt to become a killer. This version consequently takes more time to play. The version with MUD in the middle, played in New Rochelle, NY, goes up to 10 and the game board is slightly different. Players must go from the "start" oval to "1" to "10" and then back down to "1", then back to the "start" oval, which is in the center of the lowest part of the game board. This version did not have killers and players did not try to knock other players' bottle-caps off the board. End of game sequence Once a player becomes a killer, further flicks of the bottle cap can be used to knock another competitor's bottle cap outside the six-foot square. If successful in this, the player knocked outside the square is "killed," i.e., removed from the game. In other common variations of the game, the killer needs to strike a non-killer's cap three times in succession in order to "kill" that player, or another killer's cap only once. In some variations, a non-killer can become a killer by striking the killer's cap (hit-a-killer, be-a-killer); additionally, a killer's turn may either end or continue when he "kills" another player, based upon local convention. Also, some variations allow the killer to "walk the lines", the killer will pick up their cap and walk or jump along the lines of the board to get close to another player's cap and shoot from the closest point