A fan died while dancing in the crowd at Grateful Dead offshoot band Dead & Company’s concert at San Francisco’s Golden Gate Park over the weekend, reports say.

Fred Cothard, 54, a carpenter from Michigan, was attending the Grateful Dead concert with his girlfriend, when he suddenly collapsed while dancing.

Trey Anastasio of Phish, Billy Strings and Sturgill Simpson were among the special guests to join the band over three nights of concert and amid a city-wide celebration.