It says "A non-Newtonian fluid that changes from a liquid state to a solid state when stress is applied (ie shaking of the metal sheet with sound waves)."
"a non Newtonian fluid?
and if anything started behaving like this when I started singing to it,
I'd run for it.
Man, science is ....
Like, Star Trek weird.
(Actually, I think the contents of the milk jug looked a bit like this the last time I went to bed without putting it in the fridge. I'll try to get a video when it starts crawling out of the jug and demanding to see a lawyer.)