An architect can then watch the dots. Under normal circumstances, people exiting a stadium or other crowded venue leave relatively quickly and without fuss. The depart with their personal space intact. In distressing situations however people move more quickly. They bump into each other creating friction and therefore eventually slow each other down.
Exits clog like the holes in a salt shaker.
A rush of grains block the opening even though the holes are more than large enough to let single grains through. In the human version, solid arches of people form across the exit, allowing even fewer people to escape. People want to leave faster, but the result is that they are leaving slower, and then the tragedy begins. After testing a few scenarios with the computer program, the researchers have found some possible solutions for controlling mob scenes. One such solution would be to place a partial barrier in front of the exit, say the researchers.