Do you get startled easy?

I really hate it when someone walks up very close to me and are so quiet - then they talk when there right behind you. If you have carpeting in your house, people are even more quiet. Then they say something in a loud voice and it really startles me.
My arms go flying up, my nervous system reacts. I swear I am going to have a heart attack one day from being so startled.
Do you get startled easy?
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