You have been dispatched to a Veterans Administration (VA) clinic for a male patient with a behavioral emergency. On scene, the VA physician tells you that the patient is a returning veteran with newly diagnosed post-traumatic stress disorder (PTSD). Based on this information, you would surmise:

Here are some tips for EMTs who respond to combat veterans:
Take extra safety precautions
Be aware that veterans may have dramatic responses to being startled
Do things that will calm the veteran