India, Aug. 23 -- On Thursday afternoon, as the Spicejet flight SG-634 Boeing 737 aircraft waited on the taxiway N1 to enter the runway for take off to Bengaluru, passengers and crew of the aircraft and others were shocked to see an unauthorised person moving around on the ground below.

He had scaled the perimeter walls of the Mumbai airport which has slums on north and eastern sides, jumped down, strolled nonchalantly around 50 metres to the taxiway, gaped at the engine, touched the huge wheels and went around the undercarriage of the aircraft.

The man even expressed triumph over his feat by raising both his arms even as an airport jeep reached the place to keep an eye on him. But the security personnel did not step out of the vehicle to...