A Phish fan was critically injured Wednesday night after hopping over a railing -- falling 25 feet to a seating area below -- during a concert at the Jones Beach amphitheater.

The incident occurred during intermission shortly after 10 p.m, officials said.

The victim -- described by state park police only as a young man -- was airlifted from the venue to Nassau University Medical Center in East Meadow.

The spectator is in critical but stable condition, a hospital spokeswoman announced Thursday.

In addition, another concertgoer in the lower seating area suffered a minor injury. It is not clear if the victim is male or female and the extent of their injuries was no disclosed.