Well, you don't see this every day. The Pelicans and Knicks were squaring off in their debut matchup in the Summer League. During the third quarter, the game was put on hold because of an earthquake. The commentators noted that the floor was shifting beneath their feet, and the overhanging scoreboard was swaying side-to-side.
The earthquake occurred at approximately 8:20 p.m. PST, and was reportedly felt in Los Angeles as well, meaning it was a widespread incident.
The players were evacuated off the court, and some fans even made a dash for the exit. The earthquake was reported as a 7.1 magnitude earthquake, and after a while players returned to the locker room.
You can see the reaction of the fans as they slowly realize what's occurring, and it seems that no one was prepared for these circumstances, as this was surely a first in Summer League history.