To add to the rarity of gun violence, there is sismic risk and people try to ubderstand what's the current danger before reacting. For instance if the smoke ca

To add to the rarity of gun violence, there is sismic risk and people try to ubderstand what's the current danger before reacting. For instance if the smoke came from something bursting because of a starting earthquake, avoiding the surrounding building and regrouping in a clear zone would be the right course of action.