Scaring someone?

Scaring someone? I went through a drive through to Dairy Queen today with some of my friends. I usually stutter when I ask questions, or order food(or on bad days just starting sentences). Usually when I start to stutter, I usually just kinda push through it(usually with a bit of swearing like “fuck” or something”). Anyways, I gave my order, and the worker there look terrified of me until my friend ordered for me. Has anyone ever scared someone because of their stutter?