Extraordinarily interesting. it's unprecedented and the capacity of the human organism to change. it just was astounding. >> it sounds like you are endorsing this for everybody. >> yeah. let's be really clear. on that. we are very aware of the risks and would not recommend that people simply go out and do this. >> griffiths and johnson screen out people with psychotic disorders or with close relatives who have had schizophrenia or bipolar disorder study volunteers at johns hopkins are given weeks of intensive counseling before and after the six hours psilocybin experience psilocybin is given in a carefully controlled setting 123 times. to date, they say there's not been a single serious adverse outcome. >> so i'm going to tuck you in. we were told we couldn't record anyone participating in the study while they were on psilocybin because it might impact their experience. but we