I sometimes stop attempting to get anything out, and then try again. This is usually accompanied with some sort of signalling to my surroundings (so they can see I'm still doing something). Exhaling then inhaling is very likely. But I also sometimes just stick with it. Usually this will involve stopping anything additional that I'm doing too. It's actually kinda curious how that can work - entire movements can get blocked along with the stutter block. The important thing is that we don't rush ourselves. The world will have to wait, or it will have to turn without us. The brief disconnect is not something we have to worry about.