White Textured Flecking (aka, WTF)

Imagine my reaction when I walked outside and found this in my driveway.  What is this mess?  (Click photo to enlarge.)
- I have been painting a bedroom inside the house.  Did I splatter white paint on the car?  No.
- Was it 'mischief night' last night?  No.
- Did a monster bird from Duke take aim at the UNC sticker in the side window?  Or a flock?  Who knows.

Irregardless, I immediately spent $2 at the nearest self-serve car wash and washed off the mess before it ate into the paint.

I'm just glad I didn't have my bike and rack on the back...