Barefoot runner

There's a guy who keeps running down my hill wearing nothing but a pair of dark blue sweatpants. He's bare chested and barefoot. It's sunny outside but realistically about 50 degrees. And our sidewalk isn't particularly debris-free. I imagine he has a number of tiny sharp pebbles stuck in his feet.

Based on his general appearance (longish unkept curly blond hair, hairless chest, youthful, fairly athletic physique), any of the following could be true:

*He's trying to up the ante on an otherwise normal afternoon workout.
*He's trying to impress someone, like a girlfriend or a band of stoned roommates.
*He's trying to run off a killer hangover.
*He's into pain, all sorts.
*It's a personal goal.
*He's doing it on a dare and will receive $20 after he circles the block one more time.
*He's still high.
*He's training for a barefoot running event. I should see if there are any ones in the area.
*He thinks footwear is evil and wishes all the sidewalks would be removed and replaced with more forgiving dirt surfaces, never mind the mud.
*He does this all the time and this is the first time he's visited our street. He's just a super mellow, veg-friendly, tree-hugging, earth-loving Seattle dude who will return home to eat a sprout salad and warm up with a shower and a cup of green tea.