I love this idea, though a) I rarely see it done as I think it ought to be done, and b) I can never get approval for doing this the way I think it ought to be done.
Think of it: create a sales training course that combines elements of something like the famous Broken Coworker to present content, then have the user make a selection based on what was just presented. Then you get feedback and information you need to put to use later in the course based on the selection you made. You also get scored.
Now, if you have an LMS capable of doing this, create a leader board that shows everyone you're training, where they stand compared to each other.
Obviously, one of the tricks is making the best choices not too obvious so that you see enough variations in the scores to make a leader board worthwhile.