Three-time world champion Sebastian Vettel is known for waving his index finger around after a race win to signal his number one status. It turns out his Aussie teammate at Red Bull, Mark Webber, has a single fingered salute of his own.
Mark angrily displayed the bird to Sebastian during the Malaysian Grand Prix after Vettel ignored team orders to fight for the race lead, which he was able to take following a nice old scrap. Mark was not impressed.
[Thanks to Al for the tip]
UPDATE 25 March: Now with video (added below)!