In 1991 , one spectator was killed by lightning at the U.S. Open at Hazeltine National Golf Club outside Minneapolis .
Another was killed eight weeks later at the PGA Championship at Crooked Stick Golf Club near Indianapolis .
In 1991 , one spectator was killed by lightning at the U.S. Open at Hazeltine National Golf Club outside Minneapolis and another was killed eight weeks later at the PGA Championship at Crooked Stick Golf Club near Indianapolis .