It's not a joke, per say, but I work for TSA, and had just transferred to a new airport. My first week or so, I was asked if I could read a training scenario to the officers. I responded with "You want ME to read this? I stutter!!! We'll be here all day!" Got a good laugh from everyone, and it was a real good icebreaker. My stutter isn't extreme, but it comes and goes, and certain sounds give me issues.