 For the scene in "The Cham-Cham" where Penelope glides across the Paradise Peaks ballroom while singing "Dangerous Game", Brown worked the puppet from the stage while fellow puppet operator Christine Glanville controlled its wired top portion from an overhead gantry.Gerry Anderson remembered that before filming this episode APF had never shown puppets skiing, but thought that Penelope and Tin-Tin's journey to Olsen's lodge looked suitably realistic.Anderson himself invented the "ski thrusters" used by the characters during their return to Paradise Peaks.