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For the final Olympics week, we have all Olympics jokes this week, starting off with a couple of good doping jokes. Enjoy the games and the humor.More: See all previous week's jokes More: Visit the sick jokes archives More: Sick...

Tetraethyl lead: An anti-knock compound added to motor fuel. Also known as tetraethylplumbane, tetraethyl lead has highly adverse effects on human health. It causes lead poisoning.The History of Tetraethyl Lead In 1921 three General Motors (GM) engineers -- Charles Kettering, Thomas Midgeley, and Thomas Boyd -- reported success with adding tetraethyl lead to improve engine performance and reduce engine knock. Through the Ethyl corporation, then a GM subsidiary, GM quickly began touting this lead compound as the virtual savior of the American automobile industry. The discovery was indeed extremely important. It paved the way for the development of the high-power, high-compression internal combustion engines. The first danger sign was the mysterious illness that forced Thomas Midgeley to spend weeks convalescing in the winter of 1923. Midgeley had been experimenting rather recklessly with the various methods of manufacturing tetraethyl lead, and he did not at first realize