Yes, that was the Roseway doing doughnuts in the outer harbor.
A neat way to track some of the schooners coming to participate in the Schooner Festival this weekend. Go to MARINE TRAFFIC.COM and create a free account. Now you can make “My Fleet” and find some of the schooners. You can then see realtime where the schooner is. This only works for boats out there with AIS transponders so some have them, some don’t. If anyone comes up with a more inclusive way to follow the whole fleet before the Mayor’s Cup race post in the comments.