1 June 2021 - as coal scuttles

Weird: Somewhere between the Black Sea and the White Sea... somewhere between the Red Sea and the Yellow Sea.... By the way, this information is strictly on a don’t-need-to-know basis.
Normal: Now you’ve made me curious.
Weird: There must be a muddy brown sea. It stands to reason.
[exit Normal]
Smart: How did it get that way?
Weird: Well, as coal scuttles through the ship to open the seacocks--
Smart: I think you hit Prince Rupert’s drop on the head.