You probably remember when Dave Grohl broke his leg in 2015 after falling off a stage.

The doctor who helped Grohl heal, Johan Sampson, was recently in the crowd for the Foo Fighters’ set at Lollapalooza Stockholm and, upon spotting him, Grohl dedicated “My Hero” to the physician.

Grohl got the whole crowd involved after yelling, “There he is! Sing it to him!”

Sampson even crowdsurfed up to the stage to join Grohl for a bit.

Check out the video below and skip ahead to 6:10 to see the moment Dave sees the doc in the crowd.