Mostly common in racing series such as NASCAR and Formula 1 (aka F1). This happens on some tracks during races where the cars are close together and drivers misjudge how close the cars are. Thus, resulting in one big wreck after another. It can also result in only a few cars being taken out of the race instead of seven cars at once.
Did you watch the race on TV yesterday? It was a freakin' wreck fest out there!