The text is a setup for a joke that plays on the dual meaning of 'in suspense'. It suggests both the idea of keeping a turkey waiting to find out what will happen next, and the colloquial use of 'in suspense' to describe a state of anxious uncertainty or anticipation in a person. However, without the punchline, it is not clear if the joke relies on a play on words or not.
How do you keep a turkey in suspense ?