Ive eaten a foot of cactus and been able to go out in public, to aquariums, parks, pubs, shows I even went to a service at a huge Catholic Cathedral no problem. Whether or not people around me suspected I was tripping who knows. I was totally comfortable, but the cactus I had might not of been that potent, and anything more than a dose of a foot, even though it I still feel perfectly comfortable I wouldn't recommend going out in public.