We've all been there—caught outside without an umbrella as the sky opens up. Whether it's a light drizzle or a heavy downpour, instinct tells us that running will minimize how wet we get. But is that ...

The big picture: It's a scenario we're all too familiar with – you head outside without an umbrella only for the rain to start pouring down. Instinctively, most of us hunch over and start hurrying, ...