Steve Spangler’s first appearance on the Ellen DeGeneres Show. Featured science demos: Reverse Helium (SF6), Elephant’s Toothpaste, Trash Can Smoke Rings. AboutSteve Spangler Science… Steve Spangler is a celebrity teacher, science toy designer, speaker, author and an Emmy award-winning television personality. Spangler is probably best known for his Mentos and Diet Coke geyser experiment that went viral in 2005 and prompted more than 1000 related YouTube videos. Spangler is the founder of …