Let’s face it, during a negotiation things can go wrong. 

You were making  progress using your negotiation styles and negotiating techniques to  work towards reaching a deal one minute and then all of a sudden you find yourself staring at an impasse.  You have made offers to the other side, they have made offers to you  and you thought that you were approaching middle ground; however, it now  appears as though you are not close enough to agree on a deal. Now what is a negotiator to do? 

This might be the time for you to start to use MESOs in this negotiation.