Sticking leggs out?

I just started getting into watching MotoGP and i noticed alot of people stick their legg out before going into a turn.

Is there any reason for them doing this? Or is it just instinct?

I just started getting into watching MotoGP and i noticed alot of people stick their legg out before going into a turn.Is there any reason for them doing this? Or is it just instinct? http://ifttt.com/images/no_image_card.png