I know what he mean... i bet he only had a headrush... or whatever is called when the blood pressure decreases suddenly... i have low blood pressure usually, so its not uncommon for me having headrushes... sometimes when i stand up too fast and stuff like this...
Anyway, once i had a heavy one (NOT from weed), and one of my ears stopped to work. Or, like he described, i could hear, but the hearing was heavily impaired... It was like if the sounds were coming from a great distance, echoing like in a tunnel... And there were also that high-pitched sound he described... it was very trippy. Then i stood up (i didnt know that i shouldnt do this) and both my ears stopped to work and i my vision started to darken... then i felt i would faint and lay down again...
So, its possible to have this weird effect with weed... its just low blood pressure. :stoned: