Traumatic events can include natural or man-made disasters; accidents- including motor vehicle or other machinery; crimes; assaults and violence; including combat; and medical events. Not only those directly involved, but those witnessing, or even learning about can be subject to post trauma.
Normal reactions to unexpected and frightening events can include: feeling angry; feeling sad; feeling anxious; feeling guilty; feeling unsafe or hypervigilant; being self-critical about your whereabouts or how you handled things; wanting to avoid reminders; re-playing scenarios; feeling numb; difficulty sleeping or becoming very tired. These are just some normal responses.
Some helpful things to do after after such an event are: Care for yourself by staying hydrated and eating healthy (avoid the temptation of alcohol and less healthy comfort foods); get rest; reach out to friends, family or other support; exercise, spend time with pets; reduce other obligations and stresses; talk with others about your experience; avoid exposure to excessive news coverage. Most people will be fine and these experiences will subside after some time; however, some people may have residual effects- especially if they have experienced prior trauma or underlying anxiety.