I have had it done to me once when I was in heavy therepy sessions about....5 years ago now.

What he did, is he told me to close my eyes, and he would instruct me with his calm voice. Telling me to imagine this and that.

Towards the end of it all, he told me to go to a place, surrounded by things I love. I picture a feild of cannabis plants. All in full flower and ready for picking. When I was done, he said at the end I was even smiling a bit, and I didn't even notice! I'm not kidding either. True story.

My vision was all blurry after though, for quite some time. That was the only time for me. I wasn't under his command to act like a jackass, but deep within my brain, I was actually seeing these things like I was there.