I know the rule, never ever mix clorox and ammonia together, but hypothetically, if that happened by mistake, what would the course of action be to take? Just wondering, NO IT Didn't REALLY HAPPEN!

First of all the mixture is lethal. A chlorine gas so strong is given off, and can overwhelm a person in no time. The only measures I know, is move the person outside if possible, and call 911. This should never happen accidentally, and I recommend keeping them stored in different locations to make sure children don't accidentally experiment with them either.