Sorry grandma, I meant to post this paragraph with that video. It'll expain what's going on. (Besides excessive speed)
The 3,150m long Lefortovo tunnel in Russia is the longest in-city tunnel in the world. It is nicknamed "The Tunnel of Death". There is a river running over the tunnel, and water leaks through in some areas. When the temperature reaches nearly 0°C (like it does during the winter in Russia ), the road freezes and becomes as slippery as can be. The result is the attached videos which were taken during a single day with the tunnel surveillance camera. Congratulations to the dual-carriage bus driver - imagine the passengers in the back! What a ride! The next time you complain about our traffic, remember this video...Russian Engineering!