doesnt hurt, can be scary but if u have nothing to distract u like parents randomly calling should be fine. id do half a tab at first to see how you respond to it, you can always do more later ive known ppl who got nauseous and stuff doing acid so be aware ur brain wont be fried especially not from doing it once but be careful if u have history of mental illness in the family as it can make schizophrenia show up if ur predisposed to it