Enable the "Moon gravity" cheat and go to create-a-trick. For your first line, put in Front (or Back) flip. Then, switch it to 180 degrees. This will make your skater flip halfway. Set the duration between .4 and .7 seconds. On the next line, put an Other>Handstand. Have him hold it. This will make your skater flip halfway, get off his board, then hold on for dear life. This looks good if you get enough air.