Help me make the next strip!

Have not done this for a LONG time, but many of you will remember it. Take this sketch I did and tell me what the dialogue / joke should be! You will get full credit in print if you are picked! Leave it in the comments. Here is the image. (Click for a big one)

The deal

Go for it!

UPDATE: No more calls. We have a winner. Stay tuned for the morning post!