Up-and-coming jam band Goose just completed a five-night run of sold-out shows at the Capitol Theatre in Port Chester, but Friday night included a special guest.

Tonight Show host Jimmy Fallon joined the group on stage to sing "Mustang Sally."

The performance was a thank you of sorts. Back in December the band played on Fallon's show.

The Norwalk-based band then asked if it could return the favor.

The Saugerties-raised comedian would not disappoint.

Goose continues its national tour in Boston later this month.