Downey's first tweet was pretty perfect. It features a picture of him rocking sunglasses and what looks like two-day scruff. "Talk to me, Twitter," he posts. Nailed it.
But, his latest speaks to the real challenge behind the social medium: How do you confine your thoughts to the character limit?
This is in pretty Stark contrast (sorry, couldn't help ourselves) to other celebs crafting art in 140 characters. Take Busy Philipps, for instance, who last night posted her dream about James Franco.
Of course, we're still waiting on Tina Fey and Amy Poehler to join Twitter. Though, preferably they'll sign up on separate days to prevent the Internet from imploding.