In Formula One, a red flag is waved in the event of a major accident when clearing the debris from the track takes a fairly considerable amount of time. Or when there's a heavy downpour that affects visibility.
The red flag is used to indicate suspension of a race, practice session or qualifiers. If there are drivers in the pits at the time, they have to stay put while racers on the circuit have to proceed to the red flag line and stop.
The drivers who set out for Friday's morning session at the Buddh International Circuit were greeted by a dog that had strayed onto the track. Considering the kind of electronic security systems in place at the circuit, which is almost like Fort Knox, the canine's entry was indeed a mystery.
The dog was removed and the practice session re-started after about 20 minutes.
A few years ago, during the Turkish Grand Prix, two stray dogs ran onto the Istanbul track and one of them was hit by a car (driven by Bruno Senna) in a support race.
