How much do you care about tea? Now, how would you feel if an arbitrary, distant government which you had no say in imposed a tax on it? How upset would you be? Probably, not very. However, at one point in history, this was the last straw to start a revolution. If you haven’t guessed yet, that revolution was the American Revolution, which really got going with the Boston Tea Party.
Thus, on December 16th, 1773, several members of the Sons of Liberty, a rebellious political organization, boarded a ship full of tea from the British East India Company. The governor had already decided that the tea would not be allowed into the city to be sold, because then the tax would be collected. However, the Sons of Liberty decided that the tea would not be sent back to England, either. Somewhere between 30 and 130 men, dressed as Mohawk warriors, to show that they identified with American culture more than Britain, boarded the ship, and dumped all of its contents into the harbor. All of its contents, by the way, was 342 crates of tea. It took the men 3 hours to carry it all up from the cargo holds, and toss it overboard. That they were not caught, or stopped, shows either than colonists all went to bed early, and slept heavily, or that everyone who noticed decided not to do anything.
After the destruction of an entire shipment of tea, there was pretty much no stopping the collapse of the British relationship with its colonies. The revolution itself commenced just three years later.