The "potty cam" at the Johnson Space Center serves as a unique training tool for astronauts, offering an eye-opening glimpse into an everyday activity—using the toilet—seen from a different perspective. This tool emphasizes the significant difference in design between Earth toilets and those used in space, highlighting how astronauts must adapt to a much smaller opening on the Space Shuttle. It provides a humorous yet practical insight into a vital aspect of life in space that most people do not contemplate.