This won't work w/o a Memory Card, though. To save your replay to amuse your friends and family: While it is showing the replay, hit START/PAUSE and select Save Replay. This is extremely difficult to pull off, so don't do this unless you're a complete daredevil and you're going for a massive score. Number two (difficulty 10/10): If you want an even more amazing replay and with a shorter time and a higher score, drop off the starting platform, and land RIGHT IN THE GOAL. Bounce on the platform where the coaster ends until you land on it. WATCH THE MAP SO YOU LAND RIGHT ON TARGET. Number one (difficulty 7/10): On the platform where you start, move ahead and fall off the right side of it.
This is very difficult to pull off, and there are two ways to do it. Shortcut on Advanced 4 - Coaster (and then save your replay to amaze your friends!)