When I drank Guinness from a can for the first time, I had no idea it contained a little plastic ball. So at first, I thought the can had been tainted. When I found out that it must have been added at the factory, I became really annoyed by that damn ball.
That night, I had a vivid dream of drinking Guinness from a glass and the plastic ball had turned into a fly that kept diving back into the beer as soon as I fished it out. The whole time, Grandfather Westinghouse played in the background.
Pointless story, I know...