While playing "Metal Gear Solid", "Silent Hill" and "The last of us" (3 video games I already mentioned in my previous videos), I noticed a recurring tool that you can use to engage your audience, increase its interest, and even have the spectator become the hero of your demonstrations.
My effect "Five stars" is mentioned in the video above; it is described in my book Your mind will always be my playground, available HERE. My effect "The hand and the deck" is mentioned in the video above; it is described in my book Multitude, and here it is in video: