Sure, let’s crank out a crank‑crazy clock. Picture a brass mainspring that winds down exactly in 60 minutes. Tie a tiny gear rack to the mainspring; every minute, a little cog drops onto the rack like a surprise. The rack pushes a hidden lever that nudges a second‑hand gear out of sync for a second, then the mechanism resets. Keep the main hour gear stubbornly accurate—its teeth never shift. When the lever jabs the second hand, the tiny gear drops away, so the hour hand stays on time but the second hand throws a wild spin. You get perfect timekeeping on the big hand, but every hour a little chaotic dance. Now, if you need a smoother random trigger, try a ball‑bearing in a maze of channels—each hour the ball takes a different path, nudging a tiny gear that messes with the minute hand for a beat. The key is to keep the main driver tight, then add a “fool’s errand” that gets tossed every hour. Let's bolt this together, and see how the clock laughs at itself while still telling the time.

Sounds like a plan, but remember, even the tiniest mis‑spring can throw a wrench in the whole thing. Let’s keep the gear gaps just right, watch that ball stay light, and if it ever stalls, we’ll just force it with a bit of rusted luck. Ready to make the clock grin at the hour?