I've had hallucinations whilst meditating. Didn't really seek them out, but they randomly happened a couple times.
Furthermore, you have other extraordinary experiences, like for example feelings of universal love, that people seek out via drugs (ecstasy/MDMA) that can be found via meditation (esp. Metta/loving kindness).
Furthermore, you have other extraordinary experiences, like for example feelings of universal love, that people seek out via drugs (ecstasy/MDMA) that can be found via meditation (esp. Metta/loving kindness).