Revenge

a major motivator in some plots.
Sam has committed a transgression against Buck and now wants to do something bad to sam to get even.
In this case Sam has the role of the transgressor and Buck has the role of the enforcer
The rule that has been broken is buck's rule that people shouldn't do crappy things to him.
used the what links here button in the toolbox to find all the revenge situations.
I'll make a category at some point.