Гыгыгыгы. Тупо, но смешно...
Ivan Ivanovich, great russian Scientist does an experiment. He wants to know how fast a thermometer falls down. He takes a thermometer and a light, a candle light. He drops both from the 3rd floor and recognices that they are reaching the ground at the same time. Ivan Ivanovich, great russian scientific writes in his book: A thermometer falls with the speed of light.

Почти как это.