In the 'Stop' story, in the end Aftab Shivdasni stands in front of mirror and says 'stop' to himself. This petrifies him and later on he is always shown with his mouth open in a long smile, which can't possibly happen, because as soon as he said 'Stop', he is petrified, and after speaking 'stop' one's mouth ought to be closed with lips protruding outward, not with a mouth open in smile.
While watching the cricket one day match on television, Sanjay comments that if 100 runs are made in (first) 15 overs,then a score of 300+ is imminent. However watching the scorecard in an earlier shot,one can see that India in chasing 245 runs made by Sri Lanka, so reaching 300 is not a possibility.
When Karan's ghost drove away with his wife after putting water in the car's engine, the brake lights of his car were on as the car's distance increased from the camera indicating that it was not actually being driven but rather being hauled away by something else as the driver's foot was on the brakes.