Scott scribbled a few words.
Scott scribbled down a few words.
What's the difference? I checked on Google Books and it seems like "scribbled a few words" is often immediately followed by something:
"Sometimes he scribbled a few words on a note pad." [link]
While "scribbled down a few words" isn't:
"After wiping his forehead he scribbled down a few words." [link]
Is that the main distinction? Are there others?