thanks all of your replies. i never done it before. if i don't do my first time with tandem, i don't know what it will be. i'll travel half the earth to Australia, and want to feel this kind of sport. since,there's no any dropzones in my place, it's difficult for me to do this activity many times. so, i'm really want to enjoy and try skydiving in the first time of my life. do anyone had jumped in Australia, Melbourne before? what special details i need to remind myself?