On a cold morning in December 2021, a water well drilling contractor operating a 2007 heavy-duty truck-mounted unit in Clearwater, British Columbia reached 312 feet depth when the drill string encountered an unexpected pocket of subsurface gas. What followed would consume 3 days of industrial well control and cementing response, generate remediation costs exceeding $1,000,000, and leave property owners facing a municipality's cost recovery demand after their claims against the residential developer and the drilling contractor for fire remediation were denied. The event at 312 feet depth crystallizes the central tension in negligence litigation involving domestic water well drilling: the gap between what actually happened underground and what the law deems a defendant ought to have foreseen and prevented. This lesson examines the factual matrix of the December 2021 Clearwater incident through the lens of foreseeability and standard of care, the 2 elements that determine whether conduct that causes harm also constitutes actionable negligence. The geological context of subsurface gas hazards in British Columbia's interior regions is addressed elsewhere in this course; here, the focus is the specific sequence of events, the parties' contemporaneous knowledge, and how that sequence becomes the evidentiary foundation for arguments about what a reasonable drilling contractor and a reasonable residential developer should have done.