I was in the shack and was notified that @N4JAW was on, but regrettably couldn't hear him. I did hear some peeps sending "CQ MST" — had to look that up, but it's what I would have thought it was. (I do SST regularly.)
Cranked-up the keyer WPM to 20, and logged one right at the end of the hour. But yeah, 20 WPM is a stretch for me.