What would i do if i was there??

Today i saw the movie Carriers. Its about 4 friends trying to survive in a world devastated by a deadly virus. First i thought it would be some those silly zombie movie where the virus turns the people into a horrible creature feeding on flesh... but this movie was different it shows how relations and love between people are tasted in extreme situation. Few moments touched me deeply. specially when one of the actors lefts his girlfriend whom he loves by all his heart coz she is infected, when a guy shoots his older brother to relive his pain. etc.

The movie is over and i am left with thoughts running all over my brain.. what would i do if i am in such situation? what would i choose if i had to....would the basic morals i have been taught all my life would still bind me or i will.......!!!!!!!!!!