This one seems to have started it all

It was built in Mason, Ohio by Carson Williams in 2005.  It was featured in a Miller Light beer commercial, and Williams went on to run a business designing things like this for malls, etc.

It also quickly escalated

Happily for the neighbors, the music is typically not on loudspeakers but broadcast over a low-power FM station at the house.

And now this, which takes the genre to what should be its logical conclusion:

But that’s silly.  Nothing is ever done that someone won’t try to outdo.