In the middle of the night, Systrom burst into Kutcher’s room. They had to get outside—immediately. Kutcher’s room was already filling with smoke. The wall by the fireplace was up in flames. Systrom ran from room to room at around four in the morning, until all the guests made it out safe. They all stood outside in the cold, in their underwear and clutching their laptops and phones dearly, waiting for the fire department to come. Okay, Kutcher thought, Kevin’s a good leader. They became friends, and Kutcher would later help Instagram build more credibility in the entertainment industry.

