When it comes to hallway usability testing, the less said the better. Just grabbing the next 5 or so people you see and watching them use your product turns out to be nearly as effective as hiring a consultant. (Plus it's a lot cheaper.) Making lightweight testing more complicated robs the method of some of its value. So you might be better off skipping this article if you have a busy hallway near you.
This is a companion discussion topic for the original entry at https://jlericson.com/2016/06/30/usability_tests.html