Well to be perfectly honest, it was a drip of chalkboard paint that landed on the carpet. I reacted instinctively... wiping it with my papertowel & smeared it everywhere.
I panicked. This is bad.
Then I immediately thought of my vinegar-for-cleaning-loving friend. I ran for the vinegar. Fingers crossed....
BAM! It worked!
This, my friends, is how to get chalkboard paint out of your carpet!