What do those signals that he does with his hands mean?
at 29 seconds here http://uk.youtube.com/watch?v=VVAbwLGuQ_M&feature=related

l am slowing down:

http://medical-reports.com/Handsignals%201946%20Code.jpg

If you mean why does he perform strange waves in his car on the lap in, l think its because he used to play with muppets as a kid!

Its kisses for his fans. Its a latin thing.

l think its like waving your hand.similar to it.he is actually waving to his fans after winning..as waving is not possible sitting in the cramped cockpit.thats an alternative to it.

Apparently he stated it comes from a joke between his mates and is from 'The Grinch' film (have not seen it).

My understanding is that when he beat Schu for the very first time, he made the gestures in absolute jubilation and disbelief and has been doing it ever since.

Here in Brazil the tv says that it is a rabbit.

l saw an interview with him one time and he said it was from an old comedy show he used to watch when he was a kid and he has always done it. Its a private joke l believe. Wicked race though!

lol, we all did that a few years ago at silverstone when he drove the formation lap

l think its from this dance
http://youtube.com/watch?v=qeswZaReE0I

it means ''look at me im the biggest mardarse in f1 history!''

The vibrations from the steering wheel may have made his fingers have a tingling sensation. l do that with my fingers after I've mowed the lawn.

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Winter Glory - l live next next door and l am very disappointed.all this time l thought you were an F1 driver!!

PS You're still pretty good in the turns.is that a Qualcast mower you've got?

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l strongly think it signifies ppl running their mouth and yapping against him when he ended up silencing them in the end. l was a strong schumacher fan and everyone counted him out and l think thats where it originated from.