Same for gravity, two concepts, so it's -- which is quite humbling, as a, you know, if you're a teacher, and you look before and after, that's quite worrying. They do worse in tests afterwards, after the teaching.
(Risos) O mesmo para a gravidade,  dois conceitos que... — como sabem, se forem professores — são muito aborrecidos. Fazem pior nos testes, depois das lições.