Alien antennae (L) is an asymmetric flip-flop. The fidget spinner (C) does drift but requires many digits before repeating. The creepy crawly (R) reminds me of a centipede and shows the symmetric flip-flop style.

Sean is a PhD student researching geophysical fluid dynamics at UCL. He studies coastal outflows, but so far has been unable to persuade the department to send him on a research trip to the beach.

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