The main benefit of running is the fact that you reach your destination faster and have more time to dry. Specifically the thighs (if wearing say jeans) certain

The main benefit of running is the fact that you reach your destination faster and have more time to dry. Specifically the thighs (if wearing say jeans) certainly benefit from the extra time. As pointed out by other posters the biggest risk at faster speeds is splashing and I'd add the risk of slipping as well. The experiment also seems to assume that it'll rain a constant amount. That's reasonable but if it can be expected that the rain will increase (maybe it just started), running becomes even better. Conversely if you somehow know it is more likely to decrease, walking becomes better (as you might even hit a window where it doesn't rain at all that you'd simply miss by running). I certainly enjoyed this sentence though: """ ‘optimal’ solutions, cases in which the experimenter assumes strange angles with respect to the ground, are not considered, being awkward to obtain in reality. """ Personally, I find the question of "waiting it out" way more intriguing. Murphy seems to let the rain continue endlessly whenever I decide to seek shelter temporarily.