A late-night military urban warfare drill at the former Saint Luke’s Medical Center in Pasadena, California, has left residents feeling shaken and frustrated due to a lack of adequate prior notice. The exercise involved intense simulated gunfire, flashbang grenades, and helicopters, with disruptions extending beyond the originally announced timeframe. Pasadena Police had informed the public that the drill would conclude by 1 a.m., but it continued until about 2:10 a.m., prompting complaints from local officials and residents. Pasadena Councilman Rick Cole shared a video on social media, capturing the loud explosions and chaotic noise affecting nearby residents. He noted the negative impact on those needing to wake up early for work. In contrast, a similar military training exercise in Irvine, California, was conducted without incident, as local authorities provided clearer communication about the activities, resulting in less community disturbance. The Pasadena incident has raised concerns about how such drills are communicated to the public.