It is amazing how e react to situations, especially when our children are our witnesses to whatever that may be. The emotion of fear comes from way back in our lives, depending on what we experienced. we all need to work out our emotions to the best of our ability, and triggers - not easy but all about processing.
I do believe that we can scare ourselves very much, by our actions. But we are humans! that's the difficulty to work through, and the functions are generations of past and present and future.