You quickly realize that you are under the influence of weed, that's right, though the prickly thing you plucked wasn't marajuana, it's effects are exactly the same and, unless someone can break the curse, you'll remain permanently stoned.
As to the change, well, you're going to smell like you've been smoking the stuff for a week stright without bathing all the time.
Your eyes are permanently glazed and red and you have THE MUNCHIES. No food is going to be safe and the evil sorceress will have her second helping of revenge as you get fat.
Finally, you're not going to be able to string two thoughts together without the first one being lost because you'll completely forget what you're saying.
Face it, your baked and you had an idea of where to go to get help, but you forgot and started thinking how cool looking at your hand is.