It’s a heart-pounding video of a house in flames, and someone is trapped inside. Lariana Garvis was driving through a New Hampshire neighborhood when she came across a house fire. She started recording as two brave bystanders carried an elderly woman from the flames, right in her armchair. With the woman safe and help on the way, things seemed okay. But a few seconds later, one of the good Samaritans collapses from a heart attack. Lariana started to perform CPR until an ambulance arrived.