A contingency plan is a basically a back up plan it is used for anything un expected happens. Alsomit is a back up plan of action so that the sporting activity can carry on. For example:
If you are doing an outdoor activity for example football and there is a freak snow storm. So the back up plan will be to go and play football inside this would be a successful back up plan so it works. However there could be a bad back up plan for example; if you go to do a football event outside and you do not think it through if there is heavy rainfall and you go inside but forget the nets then it will be a un successful plan. So my advice would be to always be prepared for anything so that you can run a succsessful plan.
