As Felix Baumgartner rose in his balloon, so did the number of viewers watching on YouTube. Nearly 7.3 million watched as he sat on the edge of the capsule moments before jumping.
The figure is a record for live video on the site.
After he landed, Red Bull posted a picture of the skydiver on his knees on the ground to Facebook, generating nearly 216,000 likes, 10,000 comments and more than 29,000 shares in less than 40 minutes.
And as Baumgartner reached his target height, the project's official Twitter account tweeted a message that has been retweeted over 5,000 times: