Risk would be the potential of dropping something of value. Values can possibly be gained or dropped when taking risk resulting from a given motion, activity and/or inaction, foreseen or unforeseen. Risk can be defined as the actual intentional interaction using uncertainty. Uncertainty is really a potential, unpredictable, unmeasurable and uncontrollable outcome, risk is a result of action taken even though uncertainty. Risk perception would be the subjective judgement people make about the severity and probability of your risk, and may vary one individual to another.