Getting a stem cell transplant in a dream

Took melatonin with a tiny bit of weed. I fell asleep quickly and had a dream soon after. I was walking around some sort of medical facility. People were moving in slow motion and lights were a bit flashing, so I knew I was dreaming. Suddenly I saw some kind of futuristic device in front of me. I examined it - it was a stem cell transplant machine. I remember thinking "Wow, this must be the dream technology I've been reading about!" Then some dream character approached me and told me that I could input my age and state of health with a voice command. I said " stem cell transplant into a healthy 20 year old". He asked if I was sure and I confirmed. Then a robotic voice said "please place your head under the scanner". I knew for sure that this was the machine from sci-fi movies where you would normally expect to get your memory erased or something. Then I experienced some kind of bright flash of light. I lost consciousness for a couple of seconds, and then I woke up.