From an entire book of Who-y puzzles out in time for Christmas.
Makes the Cyberman invasion about 87% less scary.
Monsters acting whimsically out of character has an illustrious history in Doctor Who, from these outtakes showing some of the above behaviour to Evil of The Daleks. This sort of thing actually happening in-character can seriously undermine a monster's ongoing credibility, but Evil was going to be the Daleks' final bow and, as a rule, players love a chance to deflate a monster even more than a chance to defeat one. So don't be too surprised if next time you present them coldly logical killer robots they rewire their common sense subroutines.