Good Samaritan laws refer to the legal protection that people who give significant assistance to people who are injured, ill or incapacitated receive. This protection was created to reduce hesitation related to people who assist others, as well as to reduce these people's fear to be sued for unintentional injury or wrongful death.
Good Samaritan laws are different according to the jurisdiction because each jurisdiction has specific legal principles like consent, parental rights as well as the right to refuse treatment.
Due to the external atmospheric pressure. Initially the pressure inside the can is balanced by the atmospheric pressure. But as the air is removed from inside, the external pressure dominates.