I remember going to the very last event at Irwindale Drag Strip, before it was shut down and turned into a brewery of some sort. It was a FunnyCar only night....64 of them to start as I recall. It was a very cool show. But as the day went on people started sneaking in, knocking down fences, etc etc. And then they started slipping over the first wall by the stands, at first far from the track still. Security was no match. They kept saying on the PA that they were gonna stop the show. But the people, now a massive crowd, just kept slowly sneaking closer and closer, and they kept running the eliminations. By the final races of the night the short wall at the edge of the track was a continuous line of people sitting on it with legs over on the trackside. It was one of the most insane things I've seen in racing. I guess the promoters knew they lost control but just hoped to get through this final night. And they did. Remember, this wasn't in some small foreign country somewhere, this was in Los Angeles!