Sometimes (more commonly on the Japanese version), the camera will get stuck in "flight mode" while Mario is no longer flying. This can happen if your flight is interrupted too quickly (like if you dive too soon or if you get caught sliding on the fence). You can also reset the camera to normal by getting hit by an enemy or starting to fly again and then stopping (e.g. groundpounding once you are flying).
The camera can get stuck in flight mode if you dive too late out of the triple jump. This happens very often on NTSC-J and rarely on NTSC-U. (full backup w/ inputs)
You can back up a failed skyjump with the cannon. (120 Star only)
Island Hop
Island Hop is an alternate strat used to reach the island without a wing cap; this trick is used in top-level 70 Star runs and some category extensions.