Cool. That is actually a Deep Conditioning Treatment from an article in an old issue of G.Q. Magazine. You would normally leave it in your hair for up to 30 min., then rinse and Shampoo your Hair - but for time sake in the video you could just massage the eggs in, then add the mayo and work it through your hair, then rinse and shampoo your hair. All that would make for a really Hot Shampoo Video.
Fantastic! Can't wait for the next time you Shampoo. What about doing a Shaving Cream Shampoo? Or an Egg Shampoo w/ 6 Eggs, and add Mayo to it? That's a Deep Conditioning Treatment.