-I had the unexpected pleasure of sitting next to a geologist on a domestic flight a few years ago; he explained about an unstable mountainous area he’d surveye

-I had the unexpected pleasure of sitting next to a geologist on a domestic flight a few years ago; he explained about an unstable mountainous area he’d surveyed, stressing that it would come crashing down at some point. I inquired as to /when/ we could expect this to happen, as it sounded imminent. «Oh, any day now - definitely in the next 30-50,000 years!» And here I am, with project deadlines measured in hours...