Dealing with crowds of people can be frustrating. Sometimes, it can even endanger your life. We have all seen how quickly riots can break out. Whether it is due to a perceived injustice, or even when celebrating a sports team victory; large crowds of people can turn into violent forces very quickly. Veteran responder Mark Saxelby, who has dealt with a number of incidents involving urban unrest (including the 1992 Los Angeles riots) tells us what we need to know to avoid becoming a victim.