In this Science Max Quiz, Phil explains how to differentiate chemical and physical changes. He mentions that chemical changes produce new molecules, while physical changes don't. He includes several examples of both physical and chemical changes.
Beakman explains what a chemical reaction is and then shows examples of three kinds of reactions which he explains are like partnerships: synthesis (marriage), decomposition (divorce), and double displacement (do-si-do).
After their negotiations went wrong, Walter White misled a drug dealer by making him think that the fulminated mercury is Meth, a few moments later, he threw the piece of the mercury on the ground to make a massive explosion.