It is different in Australia, or at least where I am. You get a dial tone when you pick up the phone initially, but you get a different sound when the call has been terminated.

I'm curious about how much noise they produce. One of the problems with the traditional wind turbine design is they are quite noisy.

I'd guess they weren't dancing to the actual song or at least not the part they were recorded for and were mostly just dancing in general.

The way I chop onions without tears is to put the chopping board on a stove top with a range hood. Turn the fan on the range hood while chopping, it will suck away the tear inducing vapour.