Oh wow, I've just turned 23 and watched this with a group of people with a high end sound setup. The other people were 26 and they all started recoiling in pain (the video was loud), I looked around and was so confused as they all just looked funny. I was oblivious to anything being wrong. I asked them what was up and they didn't believe me that I couldn't hear anything at the end of the video. I honestly couldn't hear anything at all, maybe that isn't too good as I'm not exactly old. We've done an online hearing test as a group before on that sound setup, I think I got the equivalent of a 50 year's frequency range. Don't have any tinnitus or any issues like that, kinda wierd.