This incident, took place 27th January 2012 as reported in the Times of India, at WSSS."In the span of about 30 seconds, an Air India Express 737-800WL aircraft with about 90 passengers on board created a double scare at Singapore's Changi airport on Monday.First, its pilot did not wait for the vital take-off clearance from the air traffic controller concerned. As the Boeing 737-800 aircraft sped along the runway for a take-off, the alarmed air traffic control officials hauled up the pilots and ordered them to stop. The jet had reached the critical speed of 260 kmph and was seconds away from lifting off the runway when the pilot pulled the throttle back to abort the take-off.""The airline has grounded both the pilots and an investigation is on.An Air India Express spokesperson confirmed the incident. The matter has once again raised questions about the training standards in Air India Express. The airline was lambasted by the Directorate General of Civil Aviation in a recent audit for its poor training practices."A Boeing 777 aircraft had just departed from runway 02 C and so take-off clearance to the next aircraft would have been given only after a span of two minutes," said a source. But the Air India Express pilots, operating the Singapore-Trichy flight IX-681, for reasons not yet known, decided to take off from the said runway before obtaining the mandatory go-ahead from the air traffic controllerThe newspaper then goes on to explain to its readers all about the critical point of V1,V2, etc.I trust we don't do this even if it's only a simulation if using any form of ATC.