When you check something online and end up going from one interesting source to another and surfing through a lot more information than you originally intended.
"I was just checking the population of the Republic of Ireland last night on Wikipedia, and one thing led to another and I think I can break down the eight-hundred year conflict between Ireland and Britain now, also I learned how to create and cook in a prehistoric Fullacht Fiadh that was used in the Bronze Age in Ancient Ireland, and did you know that millions of years ago the North-West and South-East of Ireland were separated and situated in completely different parts of the world with drastically different climates, and were you aware that one of the oldest Irish mythological figures, Cessair, was supposedly a descendent of Noah, the same one who had the ark, and Halloween most likely comes from the original pagan festival of Samhain which used to take place in Ireland to ensure a good harvest, and they would have carved turnips as opposed to pumpkins, oh, and did you ever hear about the time that Irish and German soldiers took over Rio de Janeiro in 1828? Yeah... I might have gotten lost in the source... wait a minute - my assignments are due in twenty minutes!"