We all know that the first solo is something you will never forget. Feeling that trust from your CFI and even having family there like I did, is something you don't forget. Then there is the second first solo, the one where you reserve the plane and you fly out all by yourself from taxi to return. It can be scary with the thought of no instructor in sight but if they trusted you to fly solo, you can definitely trust that you are safe enough to do it all by yourself.