After a false start by Britain's Marlon Devonish, Bolt surged round the bend before easing down at the finish.

BBC: Stunning Jeter run upstages Bolt

Earlier, Walker had started the 400m hurdles quietly but she was on Demus' shoulder at the bend before making her move on the home stretch to claim a comprehensive win.

BBC: Walker storms to 400m hurdle gold

We could bend the lid a good five degrees before we encountered resistance -- and we only stopped there for fear of breaking the device.

ENGADGET: Gigabyte X11 review: slim and powerful but not without flaws

American Sanya Richards struggled round the top bend in the women's 400m, before battling through to win in 49.95 seconds, with British duo Nicola Sanders and Christine Ohuruogu fourth and sixth respectively.

BBC: Stunning Jeter run upstages Bolt

That said, the earcups have almost no articulation, and we had to actually bend the "frame" into shape a bit before we got a useable fit.

ENGADGET: Skullcandy unveils Navigator on-ear headphones, we take a first listen to the Aviator's petite 'sibling'

Mr Calder said the last thing he could clearly remember before the accident was doing 60mph to 65mph approaching a bend when he felt the car dip.

BBC: Driver cries over friend's death in Aberdeenshire crash

After the first bend and first jumps took an early toll on the field, Strombergs took the lead at the halfway point before the crucial big jump leading into the penultimate straight.

CNN: France win BMX gold as Briton Reade crashes