If, in the case of fire, shout, people really escape. But if the fire does not burn, it could be really wrong because it makes other people thought trouble and may be dangerous.
If in case the fire would really have to shout to people fleeing. But if the fire does not burn, it might be wrong because it makes others suffered shock undertakings may be dangerous.
If in case of fire really shouting people to escape. But if the fire didn't really burn, it may be wrong because the others panic in trouble and may be dangerous.