Say you done a deal with someone, with a ultimatum that you thought they'd never follow up on for what they wanted - however now they say they are willing to follow through with it, but you really really don't want to fulfil your end of the bargain and only really gave them this ultimatum because you thought they'd never go through with it.
Ultimatums and bargain may be revealed later, as I don't want to sway the results. Maybe.