That's the approach taken by this British family, anyway.
A father who found an unexploded German bomb in his cellar waited until the next morning to call the police because he "did not want to wake up the neighbours".
Stephen Sin, 44, was mid-way through a clean when he stumbled across the 1930s incendiary device.
He and his wife, Janice, eventually reported the discovery to the police - but only after a night's sleep and a morning of errands.
Mr Sin, a civil servant from Crystal Palace, south London, said: "We knew that this was going to happen, where literally everything stands still, so because I had to see some Scouts off to Brussels this morning I thought, it's been down there for 50 years, another couple of hours isn't going to matter."
A bomb expert later identified the explosive as being from 1936. It was originally made for use in the Spanish Civil War, but was dropped on London during the Blitz.
There's more at the link.
A better example of sang-froid would be hard to find, but I'd love to have been a fly on the wall in the police station when he finally got around to reporting it! Talk about consternation and monkeyhouse . . .