Theres a very fine line between it being ok and not being ok. The dosing scale has tiers - and it works roughly like, let's say.....40g wet/freshly picked is the equivalent of 4g dried out, they lose size dramatically. 1g is the nice microdose, 2g it might get a bit wavey, 3g you're going to feel it and anything beyond is a bit of a lottery depending on mood/predisposition. 5g or above is the scary zone and known as the "heroic dose".
That man I knew remained in a controlled environment of home and so whilst it was highly confusing, there was never any real danger. The walls were breathing, butterflies on a painting were moving and flying, cows in the field up the hill were melting and multiplying. He also saw the Microsoft Windows logo in a brilliant 3D everytime he closed his eyes, and the neighbours house became a picturesque cartoon cottage as he stood barefoot on the back lawn.