If you're bored time seems to stand still and if you're (Mind is) stimulated time seems to slip away like sand in your hand. I don't beleive time itself is effected though only your perception.

Obviously if you put a person in a coma for 6 months it would likely seem to them time had not passed at all inbetween their awakening and them going into the coma.

It is of interest to note that when the CIA was doing "brainwashing" expirements they needed a way to make the subject forget the brainwashing experiments happend at all.

Their soloution was not very novel, they put the subject into a drug induced coma and thus eventually the person lost their recollection of the "brainwashing" experiments after an extended amount of time in a coma.

So you can always change your perception of time depending on your circumstances. Bored,happy,asleep,in prison but time itself doesn't go faster or slower only your perception of it. I think in some ways time is a concrete things but in other ways it is untangible.

Time is one of the things that confuses me. Is it real or is it only a perception of humans (A purely human conept?