I sure have. I went into my freshman orientation for college (at Purdue, massive university) and had to stand up in front of a HUGE class of Freshman, and their parents, and my mom sitting next to me to introduce myself. I stuttered through the whole fucking thing. First day of classes I meet a girl and she says, “oh you’re the guy that stuttered at the orientation”. I was so fucking embarrassed. BLERG! Oh well. That was like 10 years ago and I am much more fluent now