We had someone throw a baseball-sized rock through our sliding patio door in the middle of the night (the ongoing wonders of Brandon’s America). There were big piles of glass both inside and outside. A lot of the glass didn’t completely shatter with the initial impact, but kept dropping in shards over time after it happened, throwing glass in both directions. So, I wouldn’t read too much, one way or the other, into there being glass outside Pelosi’s door.
I’m betting on the “homo tryst gone bad” theory myself. Nothing else makes sense at this point.