During Sunday's baseball game between the Arizona Diamondbacks and San Diego Padres at Petco Field in San Diego, a drone was seen flying inside the stadium, before it eventually crashed in the upper rows of seating, almost striking a man sitting there.
During the seventh inning, a GoPro Karma was spotted hovering in the stadium, before it eventually flew over the Padres dugout and crashed into an empty seat, flinging bits of debris from one of the propellers into a spectator's lap, who was unhurt.
Major League Baseball has announced that they are aware of the incident and working with local authorities. In all likelihood, the drone originated outside of the park and was flown over it. It's of course strictly prohibited to fly a drone over a stadium during a major sporting event and generally inadvisable to do so when there's not an event. As you can see in the video, the spectator was surprised by the crash and could have easily been struck in the face had the drone been in a slightly different position. Such crashes do a lot of damage to the public's perceptions of drones and reinforce why the safety regulations are in place.