The Spanish claimed that San Francisco has seven hills, but it actually has 40 or more. <Nob Hill, Russian Hill, Twin Peaks, Mount Davidson, Telegraph Hill, Rincon Hill, and Mount Sutro make up the seven original hills of San Francisco.> I lived on Buena Vista Hill for a while, and it did not make this list.

As opposed to saying that the movie, person (e.g.) is a real hoot!

Feet of clay This originated in Daniel 2:31-34, in which a figure in a dream of Nebuchadnezzar is described in this way: “This image’s head was of fine gold, his breast and arms of silver, his belly and his thighs of brass, his lets of iron, his feet part of iron and part of clay.” A stone struck “the feet that were iron and clay, and brake them to pieces. Then was the iron, the clay, the brass, the silver, and the gold broken to pieces together, and became like the chaff of the summer threshing floors, and the wind carried them away.” The moral, of course, is that a fatal flaw can be the undoing of a man and his career.

I loved reading the Greek myths as a kid so I know the story, but I don't think I've ever heard the phrase in spoken language. But I have heard "gullywasher" used when a heavy rain sweeps down the hills and cleans the streams down to bare rocks -- running water is a powerful force!