It's the Isle of Man TT Races, and event taking place on island for two weeks. The first week is practice week, the second race week. During race week, Ramsey has it's own day of entertainments, conveniently called Ramsey Day. Part of the entertainment each year is a motorcycle stunt team, usually a two man team entertaining the crowd with various motorcycle tricks. Here's just one of them.
Other skywatch skies can be found here.