::This always happens when one expert talks to a person with a different expertise. I apologise for setting the hare running. I have made a detailed response to this at Talk:Attendant circumstance. Unfortunately, it would appear to ignore the second question specific to actus reus. Please supply an example of a "key element" that is not dependent on a consideration  mens rea evidence because your example of dangerous driving appears to me to be defective for the reasons given above.