Understanding what Worship really is

I don't think I have ever really understood what worship is. I mean, I know the definition, but the true broken worship full of purity and complete sincerity. I was thinking, and I experienced that about 4 or 5 months ago, the desperate worship you hear about.
I was leading worship at New Prospect Baptist Church, in Anderson, SC. I had one my soundcheck, and it was about 5 minutes before time to start. I went to the bathroom and checked my phone while I was in there. There was a voicemail from my mom, telling my a guy I went to high school with, I knew him somewhat well, was just killed in a car accident- someone cut him on while he was riding his motorcycle, he flipped and hit his head, and the driver never stopped. I stopped dead in my tracks. All at once thoughts filled my head- was he a Christian, did I ever tell him, did I have a true chance to, and did he know if I was a Christian. I mean, we went to a private Christian school, but that doesn't mean much. I remember I stood in the bathroom, just staring in the mirror for what felt like two hours. I heard a knock on the door and a call for me, asking if I was ready. I didn't want to not play, because I knew that I could still play. So anyway, I went up, the first couple songs were kind of shaky, and I prayed for Derek, my friend who had just died.
I then went into the song "Everything", by Lifehouse, by this point I had laid it all out. The chorus makes it to where you cannot escape it: "Cause you're all I want, You're all I need- You're Everything!" I didn't cry, but I wanted to. Badly. I choked up a little, not thinking of Derek anymore, but rather about my mortality, and if God was truly my everything at that moment.
After I finished I went and sat, finally letting Derek's death sink in. I couldn't focus on my friend Matt's lesson, but then he began to talk about Judgement House, a Christian "halloween trip" that shows the life of a person who goes to Hell. (that's the short story). People talked about their experiences there, and a guy stood up and talked about it. I can't remember what he said, but I do remember how I wanted to run out of there, because I was thinking in my head that derek was not saved. It was hard, because I felt so guilty. I found out later that Derek was a Christian. But God truly showed me a lot about worship in the most unusual way. You wouldn't think that recapping a trip would be the most moving experience, but it was.