Have you ever eaten a huge platter of Mexican food for lunch, gone home and taken a nap, and as long as you were undisturbed, there were no "inappropriate" side-effects?
Planet earth supposedly did that prior to the last ice age. Sat down and had the bean burritos, the refried beans, and the 3-bean salad, all washed down with Coronas. Then earth curled up and went to sleep for about 800 years.
According to Slate.com our planet is now awakening from its wintertime digestive slumber. Our friend Mr. Earth is now lying in bed, wondering if he can release some digestive pressure, but keep it contained within the bedsheets and not disturb Mrs. Earth. Or maybe it would be better to just get up and trot down the hall to the restroom? Either way, the consequences could be disastrous for humanity.
If earth asks you to pull its finger? Don't do it.
The picture of "Methane Ice" came from here.