What is the sound of one Invisible Hand of the Free Market clapping?

You may have heard that Neil Young was none too pleased when he found out that his 1989 power anthem "Rockin' in the Free World" had been defiled by Donald Trump during his presidential announcement. You may have also heard that Trump used his moment in the spotlight as an opportunity to put forward a pet belief of his that Mexico is pushing its "drugs, crime and rapists" into the United States.

Believe it or not, neither of those two things are actually the most controversial aspect of Trump's big announcement. The actual controversy here is this: how in the world did Donald Trump get a roomful of people to cheer for the idea of him as president? Witness the perplexing display of applause from real life humans in this video here: