I first heard the song as a Fozzy track.
The song is catchy as hell.
When it became his AEW theme, I was sold on the fact that Chris Jericho had awesome theme songs. I guess the only one that could rival him is Triple H and Edge in terms of multiple entrance themes that are awesome.
Whenever I need to just get ready for... emotionally-charged things, I play the tune and just go apeshit on my laptop.