'Grandpa, what was it like in the Before time?' 'It was hell. People went around saying glass was a slow-flowing liquid. You folks these days don't know how good you have it.'

"Misconceptions", by Randall Munroe, licensed under Creative Commons Attribution-NonCommercial 2.5 License

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'Grandpa, what was it like in the Before time?' 'It was hell. People went around saying glass was a slow-flowing liquid. You folks these days don't know how good you have it.'