I was once a student, and there was a teacher at our first grade - leading linear algebra and differential equations. Such a big grandfather. His name was Boris Ilyich Friedlander.
And here is a lecture at the whole stream, a large high audience. He says he is writing something on the board. And from the upper ranks especially gifted let aircraft...
And one plane crashes into the board right next to his head. Everyone has a thought – yo-yo...
Boris Ilyich turns around, puts off the blade, removes the glasses and gives:
Everyone has read the book of Mowgli. Well, maybe no one has read, but at least the cartoon has seen... And there was a panter named Bagira. Just then drought came into the jungle, and a large river turned into a small stream. And all the animals, the herbivores and the predators, came on the water, and no one touched anyone. And Pattenter once came on a water drink, and in front of her in the stream, a lamb jumped and plunged, and stirred the water. She did nothing to him, did not eat. She just looked at him and remembered... So I’m about what – a session soon...