An IndiGo flight 6E6521, scheduled to fly from Lucknow, Uttar Pradesh, India, to Raipur, faced an unexpected delay when a monkey wandered onto the runway. The Airbus A320-251N, carrying about 170 passengers, had already received clearance from Air Traffic Control and began its roll on runway 09. Approximately 200 meters into the takeoff roll, the pilots spotted the monkey and promptly aborted the takeoff to prevent a collision. The flight returned to the apron for a thorough inspection of the aircraft systems, leading to a departure delay from the original 8:55 A.M. to 10:04 A.M. This incident is notable as it is the first time air operations at Lucknow Airport have been halted due to a monkey's presence, highlighting the unique challenges faced by airports in wildlife-prone areas.