It is a sad commentary on the business of comedy that I had never heard of Jessica Kirson before I moved to New York. Fortunately Patrick Milligan booked her on Stand Up on The Spot and I was blown away.
To call her a murderer or a crusher or a killer does not even begin to describe it. A sheer force of nature is the closest I can think of. I will drop everything and run into the room to watch her set any day of the week.
I don't even know how to use words to begin to describe her act and I think any that I did come up with would be doing you (and her) a disservice. All I can say is if you have the opportunity go see her, go. now. immediately. go.