Continuity mistake: When Rimmer finds the crew sneaking out to go fishing, he is stood facing away from them with his arms folded. In the next shot his arms are behind his back. (00:09:00)
Continuity mistake: When Lister drops the magazine in front of Rimmer it lands closed. When Rimmer begins to read it, it is open on the floor. (00:13:25)
Continuity mistake: After Lister and Ace do the 'awooga' dance, Lister locks change from being clumped together to being mostly behind his back. (00:21:40)
Continuity mistake: When the crew are wheeling the Cat in the corridors of Red Dwarf, Kryten is holding onto the Cat's hand. In the next shot he is pushing the stretcher. (00:23:00)
Continuity mistake: When the wax droids charge at the start of the battle, Santa, Marilyn Monroe and Pope Gregory charge forward, but in the next shot, Marilyn Monroe is running on her own. (00:22:35)
Continuity mistake: During the battle, the Dalai Lama can be seen running through the field after he is killed. (00:23:05)
Answer: The cello is a large four-stringed instrument, which, when it is played, stands vertically on the floor between the player's legs (assuming they are seated). If it is to grow as large as the other instuments mentioned will, it would require a rather unseemly lack of femininity to be able to encompass it with the legs.
Rooster of Doom