The Curse of the Black Spot by a Siren-like creature who marks people with black spots on their palms after they are injured and appears to disintegrate them with her touch after putting them in a trance. Rory Williams receives a cut during a tussle with the pirates, and finds a black spot on his hand, but is prevented from succumbing to the song of the Siren by Amy Pond and the Doctor. Surmising the Siren is using water as a portal, the Doctor instructs the crew to seek refuge in the ship's dry magazine. There, they find Toby Avery, the son of the ship's captain
Billiard ball cue balls, one for each player. Bumper pool requires four white and four red object balls, and two special balls, one red with a white spot and the other white with red spot; all are usually inch (approximately 52.5 mm) in diameter. Bar billiards uses six or seven white balls (depending on regional variations) and one red ball in diameter. Several brands of practice balls exist, which have systems of spots, stripes, differently colored halves and/or targeting rings. For example, Saluc markets several practice ball systems, including the Jim Rempe Training Ball, a marked with rings and targets on the