A few days ago my friend, William and I were discussing causing illusions on each other. He tried to get me to see a light and I tried to get him to see rain, but we didn't tell each other what we were going cause the other to see. We both closed our eyes and let in the others energy. Afterwards William wanted to try again but I said that he will see snakes. Then he got mad because he's afraid of them, and I didn't know. Then when he went to sleep he dreamt of one killing him.
So my question is: did I cause it?
But I told William that it was probably his subconscious dealing with his fear.