Had this happen to me in a Chipotle in Phoenix.  Guy walked in with a gun on his hip and I wasn't sure if he was a good guy or not.  Thankfully he was because my gun was in the car.

I was in a theater in Victorville while my car was being worked on when a guy walked in carrying a backpack.  My mind started thinking about another theater shooting and where I was gonna go etc.  How life has changed.