Hallucinating after smoking weed?

I've only smoked weed a few times (about 5, mostly from a joint, and once from a gravity bong, until recently), but the other day I took one hit off a bong and hallucinated. It was like a dream sequence, and I was having all these crazy visions and traveling through time in my mind, as well as going through a bunch of different "realities". I was in this state for about 15 minutes, and totally unresponsive. After that I was conscious, but stayed very high and could barely function for about 3.5 hours. The weed was high grade, and I was smoking with a few other people, all of who took multiple hits and didn't have nearly as intense of a reaction as I did. I'm really confused why this happened, especially because I only took one hit, and people who were smoking the same weed were totally fine.