My use case is that I want the ability to programmatically show simple messages 
to the user and then end the pageflow when they click "Ok" on the message page. 
The reason for that is for edge cases where certain conditions arise where the 
user shouldn't continue any further in the pageflow.

In psuedo-code, it'd look like:

  | if(someEdgeCondition) {
  |    Message "Sorry, but you can't continue. Please try again once you fix 
it."
  |    EndPageflow
  | }
  | 

Basically just like exception throwing should work, except without the long, 
multiple stack traces being put into the webapp's error log.

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