I heard this customer service announcement on the London Underground myself while running to catch a tube train at Westminster Station, so I know it’s true, as opposed to the ones that circulate in emails. Ah, the power of CCTV:
“Will the gentleman on the eastbound District Line platform stay exactly where you are. Yes, we can see you. We’re rushing a mop and bucket down to you right now and you can clean that up yourself”.
No, it wasn’t me.