The closest I've gotten to visual hallucination is when I smoked 2 blunts and 8 bowls of some dank ass shit. Everything had an aura around it. It was tight as hell.

The closest thing to an audio hallucination is when I was watching TV, and I could see the people were talking but there was no sound, so I turned up the volume, still no sound. I turned off the TV and turned back on, but still no sound. Finally I just sat there... and then about 10 minutes the TV sound came back. And my friend said she had been yelling for me to come look at something... but I couldn't hear anything, freaky.