On a humid Thursday morning at Chaudhary Charan Singh International Airport in Lucknow, Uttar Pradesh, India, an unexpected incident caused a significant delay for an IndiGo flight. As flight 6E-6521 prepared for takeoff to Raipur with 135 passengers on board, a monkey darted across the runway at approximately 8:55 am. The pilot's quick application of emergency brakes prevented a potential accident, bringing the aircraft to a halt before it could reach full speed. After the aircraft was moved to the taxiway, standard safety protocols were initiated, including a thorough runway inspection by Air Traffic Control (ATC). Following the checks, the flight eventually departed at 10:05 am, over an hour behind schedule. Passengers reported moments of anxiety during the abrupt halt, but the crew managed the situation calmly. The monkey, which had entered from the city side, loitered around the airstrip for nearly an hour before being driven away by security personnel. Despite the incident, an airport spokesperson denied any disruption to operations, highlighting ongoing challenges with wildlife intrusions at airports near green zones. Aviation experts stress the importance of safety protocols in such high-risk zones, noting that even small obstructions can lead to serious consequences.