A Cyberman that removes its hand, which then scuttles about like a hand-shaped robotic spider, is so silly they already used the gag in an episode of Red Dwarf.
…to Red Dwarf (“The light’s stopped flashing… Does this mean he’s on his way, or do I have to change the bulb?”).
…elevating it above the mid-tier Red Dwarf episode it keeps threatening to become.
By contrast, the original droid Twirly has echoes of Red Dwarf’s Talkie Toaster, which is hilarious in itself.