Iceland was formally neutral in World War II. It still had ties to Denmark — their king was still formally the head of the Icelandic government — so the fact that Germany invaded Denmark was sort of a big deal.
The UK thought it'd be a good idea to act first on securing Iceland; might as well grab it before the Krauts do, they surmised. So, they put together a sloppy invasion strategy — because Iceland had no military, it didn't have to be great — and set about the task.
In the middle of the night before British ships were to land, a reconnaissance plane was sent forward to scout out the harbour. The pilot mistakenly flew over downtown Reykjavík, and because Iceland didn't have any airplanes at the time, this woke a lot of people up, including the Prime Minister. So much for surprise.
At any rate, in the morning, the British ships came into the harbour, and a crowd of curious Icelanders was gathered around. The British consul in Iceland knew about the so-called invasion beforehand, so he went down to make sure everything was going smoothly. The crowd — which included some police officers — was getting in the way a bit:
British consul, to Icelandic police:
Would you mind getting the crowd to stand back a bit, so that the soldiers can get off the destroyer?
Police reply, essentially to the army that was there to invade them:
A little later, a pissed-off local did this:
One Icelander snatched a rifle from a [British] marine and stuffed a cigarette in it. He then threw it back to the marine and told him to be careful with it.
Ah, Iceland. My kind of place: endlessly polite, even to invading armies. Full story here.