Many times they are like that. It doesn't take much to send you back to your physical body focus again. At first the trips "out" are very short. But that improves when you learn to not only navigate your new surroundings, but also become consciously aware of exactly what is happening to you at the current moment.I have had spontaneous ones and travel in my sleep. My first adult conscious one was in college and I found myself by train tracks. An approaching train sent me quickly back into my body. I had used the silver cord technique back then.