A 13-year-old boy attending a Taylor Swift concert at CenturyLink Field in Seattle was injured when he fell from the 300 level of the stadium to the 200 level.
Firefighters say the fall, which occurred around 7 p.m. during an opening act for the concert, was equivalent to a one-story height.
Vicki Binns was at the concert with her family. She told the Seattle Times, "It was shocking to see. It took a moment to realize it was a real person."
Paramedics described the boy as "stable, alert and conscious" while they treated him at the scene, and he was later taken to an area hospital where the Seattle Times reports he is in serious condition.
Another witness added that falls at CenturyLink Field have been a concern for spectators because many believe the railings at the venue are too low, especially in the stadium's suites.
According to Kyle Moore, a spokesman for the fire department, the boy couldn't remember what caused him to fall.