Okay, well people report that they felt like they dreamed for days, although most people think it's just over the span of a few days, they didn't actually do stuff for 48 hours straight. People can sleep and dream for as long as all night in real life, and can feel like they are dreaming for as long as that, or even all day.

There is even a report of an OBE that lasted 100 years, but that is clearly bullshit. I mean c'mon. One guy who was actually one here said he dreamed for so long, he felt sad about the whole experience he had to leave, almost like another life he had was gone.

So really, dreams can feel as long as you want them too. If you expect a 15 minute mess around, thats what you will get. If you expect Lord of the Rings from start to end, then you will get that.