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He looks like he's praying, trying to keep his bowels under control or both.
Note the position of the drivers arms and hands. He is working hard to keep them against his chest to keep them from being broken by flailing wildly outside the cockpit. This is why the roll over bar was made more substantial and safety netting and arm restraints were added. As lots of racers suffered broken arms and crushed hands in the past. Great shot.
Keep your hands away from the steering wheel too. Holding onto the wheel during one of these can break your thumbs and wrists.
He's yappin' on the cell.