What's the best way to stop hallucinating once I take shrooms?

Want to go on a fun trip, but I know I'm prone to short sight hallucinations when I get high, and I don't want to be hallucinating the whole time. What's the best way to stop? Or maybe it's something I already have in my fridge?<br><br>Edit: I don't have a fridge in my dorm, but I can do some research on the vitamin D thing. I thought I'd be able to stop it since I'd just gotten really high on weed and had a green haze that went away once I calmed down, but I just wanted to check anyway.