I should have added to my post above - you've had a rare experience as most pilots never see any kind of incident, let alone one where someone gets hurt. The Grob incident may have looked dramatic but the cockpit looked undistorted and in a similar scenario there is a very good chance that you'd walk away shaken but in one piece. When you get ready for solo circuits you'll have been very carefully trained by your instructor (it's his/her licence at risk!) and as long as you remember that every approach is an approach to a go-around and you may happen to land if everything is just right, you'll be fine! You'll never get to make all the possible mistakes as there isn't enough time in any one life so make sure you learn from those of other people and go on enjoying it.