Lenz's law, cloud chamber, and Bernoulli's principle.

Does your head hurt just from recalling the days spent buried deep beneath layers of physics homework and practice exams?

Well, fear no more, for "Granny Wu" is here to the rescue.

Wu Yuren – a retired professor from Tongji University, Shanghai – became popular among netizens recently with her hardcore yet entertaining videos about physics.

Watch the video to see some of the silly experiments this "science granny" has to offer.

Video: Yan Maoqiang, Ma Chi, and Guo Kai