relax and enjoy - as someone above said its a bit like a fairground ride while you are first learning. Once you start taking the controls during a launch you dont really notice the acceleration as much - you are too busy. The acceleration is similar to a high performance sports car ie 0- 60 ( depending on wind speed etc) in about 4-5 seconds so not that extreme, and then speed is more or less constant all the way up. The instructor should be talking to you all the way through the launch. Depending on the launch height available and weather conditions you may only get a short flight but its great fun and a cheap way to fly.