Looks like a tractor trailer towing prefab house parts took a turn a little too hot, resulting in the truck ending up on its side and its wood cargo splintered all over the southbound I-270 ramp to I-370 in Gaithersburg, Maryland.
WUSA9 reports that there were no injuries, but "the right exit ramp and right shoulder are closed and will be closed for some time." So find another way home today if this is your neighborhood.
It looks like the some of the McMansion components actually held up fairly well from the impact, maybe they'll still be usable after a little sanding.
Images courtesy of Meta Pettus at WUSA9!