I want to punch that guy in the face. Only a miserable person could say something like that. There are people out there who wouldn't think twice about your stutter, trust me. The tremble may be caused by more trying to hold the stutter back more than you're used to. You're not the weird person at work, just like anyone who is different in another way isn't the weird person. You talk a little differently sometimes, that's it. If you want to improve this thing, you're going to have to work on your fears of blocking or stuttering. Stuttering isn't that bad when we don't make it bad. If you try to let yourself be ok / become comfortable with how it naturally comes out, the fear will slowly die down. Easier said than done or course