persuasion (if there is time)
explanation of the danger of false
use of force
removal (isolation), the most evil mongers
To stop the crowd is much easier with timely isolation of alarmists, as well as reducing the group as possible. Partition off a road from crowd that moves is very difficult, because front people of the crowd feel pressure from back ones.
How to solve the problem?
You must believe in yourself, or in the rightness of what you are doing. Motivation of your personal actions should be sturdy force, which helps to overwhelm panic and anxiety in crowd. Experience, previous challenge of your live can give you the strength. If you want to survive in a disaster or emergency situations you should always be emotionally prepared. You will be in better state, and you everything will be ok with you.