When too many people are squeezed into too small a space ... a professor of crowd science at Manchester Metropolitan University in England. "People don't die because they panic.

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Scenes of panic moments after 'car runs through crowds' at Primrose Hill fireworks display in London. A team of police officers are seen at the spot, as screaming crowds attempt to move away.

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At least eight people have died and scores of people have been hurt after a crowd surge on the opening night of a music festival in Houston, Texas. Panic broke out after the crowd began to press ...

2 to 4, there's no need to panic and cancel ... many people should be in a crowd, the density should never rise above four people a square metre. Especially if that exceeds six people per square metre ...

A woman caught up in Bristol's protests has praised a "hero" who came to her aid after she suffered a panic attack amid scenes ... was eating outside Pasture when a crowd of far-right protesters ...