Jerry Birley, BLB's Man In Uganda, has sent us this link, and says:
The 3,150 meter long Lefortovo tunnel, in Russia is the longest in-city tunnel in all of Europe . It is nicknamed 'The Tunnel of Death'. See for yourself why. There is a river running over the tunnel and water leaks at some points. When the temperature reaches 0°C like it does in winter in Russia, the road freezes and becomes as slippery as... well... ice. The result is the attached video which was taken during a single day with the tunnel surveillance camera. Congratulations to the bus driver - and imagine the passengers in the back... what a ride!
And if you like this (you heartless devil, you) then click through for more...
This is a pretty good demonstration of Newtonian mechanics - conservation of momentum, etc...
Mind-blowing footage. And yes, the driver of the articulated bus deserves a medal and the passengers deserve a clean set of underwear!