I was working near the World Trade Center during 9/11. I had two PTSD episodes - each one was triggered while watching a movie on the big screen. Last time it happened was just last month ("Arrival" if you're curious), and it was surprising because the last episode was literally ten years ago ("Superman Returns"). I was pretty embarrassed at my reaction both times, but I realized it was par for the course. I personally think that part of recovery is forgiving yourself whenever these episodes come into play.
One thing that PhoenixJ said...
I am not brave or strong enough to do this one alone.
I actually think it's braver to bring other people into the process. My husband witnessed both episodes and believe me I was trying very hard not to turn into a mess right at the movie theater. I was afraid that he would judge me for not being stronger. That couldn't have been further from the truth.