a couple of these responsed confused me.. i thought the subconcious was the the part of the mind that had no fear since it is the part of the mind that is supposed to know past lives/ present life memorys.. anyways my guess would be increased awarness of youre physical body.. i used to get the same feeling during my OBE practices.. dont get discouraged.. took me about a year to get a couple.. they are well worth it though! one technique i use is concentration on the heart.. just increase youre awarness through the day and at night concentrate on youre heart and it should produce at least some vibrations.. good luck!