Oh yes, I've noticed.

I would suggest reading the books of Carlos Castaneda if you're curious about experiencing the "impossible". Although the stories may be fiction, they eloquently provide powerful insights into the nature of our shared dream-state, and may open your mind to experiencing it.

Like I said, it requires the available spiritual energy (or personal power), and flexibility of perception. Destructurization of the ego is also a big part of it, although probably one of the most difficult aspects of achieving these experiences (at least on a somewhat consistent basis).