It's a feral paraparamilitary drone.
Like a puffer-fish, it responds to stress by simultaneously deploying its flick-knife, toothpick, pimple-popper, nostril hair trimmer, blow dryer and cigarette (thank you, [a1]).
Then it scuttles towards safety.
Ancestral memory leads it to associate pockets with safety.
Pocket- wearer discombobulation ensues.-- pertinax, Aug 05 2022 [+]-- Voice, Aug 05 2022 Slight timing issue: a stressed out one of these clankrolling slowly towards me would tend to make my pockets shrivel.-- 4and20, Aug 05 2022 + I think it is so cute!-- xandram, Aug 05 2022 random, halfbakery