1) The clock turns the other way: The Autodromo Jose Calros Pace is one of four circuits on the F1 calendar where the cars run in an anti-clockwise pattern. For the longest time it was the only circuit of its kind on the calendar that put a lot of strain on the drivers' necks aside from other muscles that were used to clockwise running. Drivers aside, tyre manufacturers also have to deal with load pressure building up on the right hand side of the car instead of the left.
2) The weather outside looks frightful: Whether held in the first leg of the season or towards the end, rain has been a constant feature at the Sao Paulo based circuit, and it has led to plenty of eventful qualifying sessions and races. Just last year, rain helped Nico Hulkenberg put his unfancied Williams car on pole position before eventually slipping down to seventh. Giancarlo Fisichella's first F1 win came at a chaotic race in 2003 when the run-off area of the second corner of the circuit resembled a very expensive car park due to the number of cars (including Michael Schumacher's Ferrari) that had slid out in wet conditions. And of course, rain at the circuit played an extremely vital role in setting up the nerve-wracking finale of the 2008 drivers' championship showdown.
3) Trying out the unknown: Pirelli has brought a new type of soft compound tyre to the Brazilian GP that were first tried out during the young drivers' test following the Abu Dhabi Grand Prix. How they behave over the course of the 71 lap race on a circuit that has anything but the billiard table smooth surface like the Yas Marina circuit and the BIC could turn out to be a deciding factor in the race.
{{/usCountry}}3) Trying out the unknown: Pirelli has brought a new type of soft compound tyre to the Brazilian GP that were first tried out during the young drivers' test following the Abu Dhabi Grand Prix. How they behave over the course of the 71 lap race on a circuit that has anything but the billiard table smooth surface like the Yas Marina circuit and the BIC could turn out to be a deciding factor in the race.
{{/usCountry}}4) Last race fatigue: For a lot of F1 fans, the world championship is just something on TV that helps kill some time. But for the competitors, crew, broadcasters and the journalists who have traveled to every one of the 19 races, the Brazilian GP is a welcome chequered flag to a very long season. The fatigue amongst the crew, in particular, could translate to a bungled pit stop, a wheel nut that wasn't screwed on tight enough or something similarly crucial.