Suppose you're sauntering about Saint-Germain, Paris, from one cafe to the next, staying only as long as it takes you to knock down a few Brilliant problems. You're wrapping up at Brasserie Lipp and want to go to Cafè de Flore, which is across the street.
The only problem is: it's pouring rain!
If you want to absorb as little water as possible, how quickly should you run across the road?
Assumptions