The man in the orange protective jumpsuit spoke up for a third time: “This is going to be 10,000 gallons of propane fuel exploding. It’s not going to be over quickly. For 26 seconds, you are going to feel a continuous burn, like holding your hand over a bic lighter. Do not try to run away; there are lots of people and bicycles behind you. If you need to, stand and slowly turn your body, like a rotisserie cooker. At no time are you to run towards the flame!” I glanced around at my neighbors in the crowd; no one looked particularly eager to test the boundaries after that lengthy warning.