1). If you are on water, then get teleported to a different Z level, it will still act as you are on water... So say if your stam/chakra training then go to chuunins or war, and DONT DIE, you will still be water walking/mountain climbing where ever you move, until you die or go back to that Z level.
2). If you use mirrors inside a dungeon you can get to other floors by walking on the 'Invisable Turfs'.
3). If you are in a war, you can use a dungeon scroll and there cant be anymore wars till either of the kages die, or surrender war.
4). If you attack Hair Shield it says, "Your attack bounced off the sand!".
5). if your wearing some type of hat, that makes hair disappear, then talk to a barber shop man, your hat wont take away your hair anymore...
6). During a bijuu attack, a kage can war another village till the bijuu escapes, rendering the kage to never get a bijuu T-T