I was there at the same time, from the previous Wed to the following Mon. I didn't see any other Busa's though the people I was with saw a red one. The guy apparently was stopped at a scenic overlook on the dragon just above the lake. My friends stopped to talk to the guy and they asked him if he had seen another Busa come by a little while ago. He supposedly said "I think so, all we saw was a dark streak go flying by."