Sometimes, schedules just happen to line up. It happened back in June, when Trey Anastasio wound up on New York City stages with both Goose and Billy Strings in the space of a week, and it happened again on Friday when Trey Anastasio Band and Goose’s co-headlining tour landed at EagleBank Arena in Fairfax, VA on Billy’s off day ahead of a run in nearby Washington, D.C. This latest confluence of circumstances culminated with an unhinged “Carini” encore featuring all of Trey Anastasio Band, all of Goose, and Billy Strings on electric guitar, but the evening took an eventful path en route to that big finish. Per TABoose tour custom, Goose got the night started with a lively set.