On the Ferrari pit wall chief track engineer Chris Dyer was overseeing the whole operation.

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Flooding and a pit wall collapse put an end to mining in the mid-1980s.

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Force India's Vitantonio Liuzzi was 15th, but lucky to escape without injury after crashing into the pit wall.

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Schumacher was given a 10-place grid penalty for dangerous driving after pushing Barrichello up against the pit wall as the Brazilian attempted to overtake him in Budapest in August.

BBC: Michael Schumacher reprimanded for blocking Barrichello

But when the order came from the Mercedes pit wall to bring both cars home safely without taking any more risks, Nico Rosberg listened and didn't pass Lewis Hamilton, despite having a faster car.

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Heat radiation coming from inside a pit, however, is more likely than not to encounter the pit's wall before it escapes into the outside world.

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The bodies of Chloe Jade Arwood, 6, and her cousin James Levi Caldwell, 7, were found at the bottom of a 24-foot-deep pit on Monday morning, more than 12 hours after a wall of the pit collapsed on them behind a family member's home, authorities said.

CNN: Searchers find bodies of children buried by wall of dirt

The children apparently were trying to retrieve a small "child-like pickaxe" at the bottom of the sloped pit when the dirt wall collapsed on them before 6 p.m.

CNN: Searchers find bodies of children buried by wall of dirt

Paul Gray, 50, disappeared when he climbed over a wall and into the pit after Craig Whipps became submerged in the slurry at Albyns Farm, near Ongar.

BBC: Essex farm workers 'overcome by slurry'