1. Don't do anything stupid. Analyze the situation, and find others.
2. Form a survival group, and punch the most innocent-looking one just to be sure.
3. You just struck the innocent-looking one, so now you're the mean one.
4. Become the take-charge mean one, and lead your team to safety!
5. You got some of your people killed by the monster/killer.
6. In the midst of this tragedy, take the oppurtunity to romance your love interest.
7. A helpful stranger reveals a critical plot detail/ tries to kill you. Say thanks, or run.
8. Big surprise, your innocent-looking group member snaps and tries to kill you.
9. After the traitor dies in some ironic way, confront the remaining threats.
10. If this is a happy movie, you will make it out alive with your love interest, maybe more.
11. If this is a sad movie, an unknown amount of you will perish.
A. If you survived, hooray, get some rest for a sequel.
B. If you died, get some rest for...ever.
C. Sequels (seriously).