Although he lost the point, he went on to beat Karlovic (23 world, 6th seed) in three sets 4-6, 7-6(0), 7-6(4).
Rumor has it that Andy Roddick worked with Ryan on this shot at the behest of Grant Doyle, coach. I made that up. Who knows?
Harrison takes on Ferrer tonight in the semis no earlier than 10:00p (Central Time U.S.; GMT-6) and I believe it's only being covered on TENNISTV. Correct me if I'm wrong.
See the story and video.