answer: #Person1# thinks the new exercise class is too hard while #Person2# thinks it easy. So they make a bet that #Person2# handle it easily.
documents: #Person1#: I'm exhausted. My new exercise class is so hard, 
  #Person2#: I think it is easy. I could work in your class with no problem. 
  #Person1#: You thing so? 
  #Person2#: Oh, without a doubt. When is the next class? 
  #Person1#: Tomorrw morning. Try it. 
  #Person2#: No problem. 
  #Person1#: Are you going to this class this morning? 
  #Person2#: Of course, easy. No sweat. 
  #Person1#: You're no able to move after this class. 
  #Person2#: Are you kidding me? It's going to be up a piece of cake.
  #Person1#: Well, I don't believe you!
  #Person2#: You want to bet?
  #Person1#: Yeah, what't the bet?
  #Person2#: I bet I can go one hour in your class this morning and not feel a thing.