Actually, out-of-body experiences, alien cultures and contacts are "normal" on lsd trips. This can also be true with psylocibin.
You guys talk about voyages through space, and I've done it too... but I never get scared... I love to travel out of my body, and to go places that only exist on my imagination. But the felling of being alone in the space, between the stars, the small brilliant dots around us... without any kind of needs... no need to breath, to talk, to eat... and the absence of time... all of this get me freakin... I love it. I love to stay in my body, and start to get out of it... where my conscience begins to elevate it self right to the skyes, leaving my body. I can see perfecly all the surrondings, including my body on the ground. After some time, I can see and "feel" the intire globe, and this way, I fell part of the whole! Once again, this is suberb!
I started my lsd trips with some afraid. It's true. No one is prepared to it, before trying. But the experiences get better, and you start to know some of the way to control your trip, to take it wherever you want them to go... and they turn even great...