The jump
When you arrive at the airfield, you will first need to fill out some paperwork. After that's done, you will be given a briefing on all aspects of the jump. You will be told what to do during the exit, freefall and landing. You will then get geared up and on the plane.
After the plane takes off you will have about 15 minutes to enjoy the scenery while the plane climbs up to altitude. Before jump run, your instructor will do a final gear check, tighten all the straps, and then you jump from 13.500 feet! The freefall will last approximately 50 seconds, depending on a number of variables. The instructor will open the parachute, and then you fly around for some time before you land back on solid ground.
After landing you will be presented with a Tandem Skydive Certificate.