Me too... but for me the "things" are mainly distant (or faint) sounds which i could not hear if were sober... or some times,when im very very stoned, all the sounds hear are "translated" into words, so a cat seems to speaking (actually speaking) "meooowth", the insects "cric, cric, cric" and so...
it was then i understood what Tolkien mean when said the Elves could hear the singing voices of the rivers... (and i bet he was a pothead too)