I had a good one not long since coming into LBA from Tenerife, a lively bit of chop on approach caught out a pax who'd decided the seatbelt lights didn't apply to him and went walkies to the toilet. A stern word from our (most junior) cc and an awakening crack to the elbow soon taught him the error of his ways.
More widely - when in cruise and with belt lights off this kind of thing is always going to happen if cat happens without warning. I was once told, in the space of two days, to encourage pax to walk up and down the aisle to prevent dvt while also advised to keep people plugged in if at all possible.
If the turb don't get em, the blocked up veins will
