Dizzy

There are two possible situations here. Either Ebby likes the Halo theme, or he would rather make himself unbelievably dizzy in order to block the music out. Personally, I believe the former.

Here's some evidence to support my case.Ebby in fact. Moved Andrew's chair to the position you see then moved his chair in front of the computer and started playing as if it was his last chance to do so before being sentenced to live the rest of his life on a desert planet.