On January 16, 2024, FDNY members experienced an extreme fire event while operating at a residential building fire at 2162 Valentine Avenue in the Bronx. A fire in an apartment on the third floor of a six-story H-type New Law tenement extended into the public hallway, up the interior public stairwell, and blew fifteen feet out the roof bulkhead door.     In this episode, host Battalion Chief Jason Cascone discusses this fascinating operation with Lt. Brian Currid and FF Rob Camaj from Ladder 33–the first due truck– and special guest Dr. Dan Madrzykowski, Senior Director of Research for the Fire Safety Research Institute (FSRI), part of UL Research Institutes.    An analysis of the fire concluded that the extreme fire behavior was caused by a combination of basic fire dynamics and combustible paint in the public hallway. A chain of openings—that included a failed fire-apartment window, the fire-apartment door and the roof-bulkhead door—created a low-intake, high-exhaust flow path.