Was it a spirit or was I hallucinating?

Last night I smoked some cannabis to relax. I was only slightly high, as I only smoked a little. So as usual, I light a candle, put on my headphones, and just relaxed the to music. The song that I was listening to was by an artist that had passed away (I had the song on repeat on my iPod). As I was listening it came across my mind that I really admire his music, and that I really wanted to meet him (but knew I would never see him live or anything because he's not here anymore).

I was imagining I was watching him play the song live as I was reaching a meditative state. Then all of a sudden, I felt the presence of him right in front of me in a form that I don't even know how to describe. I couldn't see, nor hear him. I didn't sense him in a particular spot in my room. It felt like he was made up of the air around me.

Immediately I started to get really emotional and couldn't stop crying. I felt that he was right in my face literally. The air felt so thick, like a blanket of "energy" was over me. My heart was pounding really hard (with emphasis). I didn't see him, my mind was blank, all I saw was the things my room from the candlelight, but his presence was undeniable. There were no words, all I rememebr was that I kept saying in my head, "oh my gosh, I can't believe this is happening." Even though I respect him, I was a bit scared and wanted him to go away. I almost wanted to wake up my parents in the other room.
I don't know how long it lasted, maybe 5 mins. It was the most intense thing I've ever been through. It was very emotional. These words doesn't even come close to describing what I had felt last night.

I know I may have been hallucinating from the cannabis, but this has never happened to me before. I was nowhere close to being officially high, and I've never been REALLY high before.

Sorry, this is long.
I don't know, I think maybe the song is so awesome that it has the power to do such things to people. lol