i've had plenty of hallucinations on clean pills (usually when taking 3, 4 or more) like seeing people's heads move and talk/laugh when in fact they were sleeping, seeing my friend in a green shirt go by and going after him then realizing that there's no one wearing a green shirt nearby, colorful CEVs, ...
when you throw mda into the mix it gets really wild: seeing tiled stairs all over what is supposed to be grass, burning hills in the distance where it fact was flat land, seeing blood pumping through the veins of the clouds (wtf?!?), really crazy CEVs and of course the ominous shadow people.