it is a rush and great experience. words cannot adequately describe it. you will feel like you are floating and not falling due to the lack of reference points. i did my first jump which was an unattached free fall for 45 seconds (12,000 to 3,500') in the late 70's. then you had to have FAA approval to do a free fall on your initial jump. you will probably be hooked to your instructor for the jump or do a static line. it will be a great time. good luck and enjoy!
