Dave Grohl has been milking his leg injury for all its worth — he made his own special throne to sit on during his recent Foo Fighters shows, and he’s brought out a bunch of guests to compensate for his mobility issues. The latest stop on the Foo Fighters tour was at Fenway Park in Boston last night, and Grohl brought out Dr. Lew C. Schon, his orthopedic surgeon, to look on as he covered the White Stripes’ “Seven Nation Army.” Watch some far away fan footage below.