Bukkit

How to fly:
There are two kinds of flying now, Kind 1, and Kind 2, they are chosen by the server admin. (Default is kind 1)

Type 1
Step 1: Find a pig.
Step 2: Saddle it.
Step 3: Get a "whip" (fishing rod) and jump on!
Step 4: Point "whip" in direction you want to go (preferably up) then click. (Making sure you are holding your "whip")
Step 5: Hold on for the ride!

Type 2

Step 1: Find a pig.
Step 2: Saddle it.
Step 3: Jump on!
Step 4: Point cursor in direction you wish to travel!

Note: On some servers you may have to pay to ride the pig

How to land:

Type 1
Step 1: Point your "whip" at the object you want to land on.
Step 2: Wait for the pig to reach the ground, then right click to hop off.

Type 2
Step 1: Point cursor at ground.
Step 2: Once you reach the ground, hop off.

How to drop TNT:

Step 1: Get TNT
Step 2: Mount your pig.
Step 3: Fly to your drop zone.
Step 4: left click with TNT in your hand.
Step 5: Enjoy the fun!

How to use Machine Gun:

Step 1: Get some arrows (atleast a stack)
Step 2: Mount your gallient steed (or humble pig - either one)
Step 3: Zoom-ity-zoom to your enemy, and then press the "SHIFT" key will you have arrows in your hand
Step 4: Enjoy the fun!

Note: The admins need to give you permission for you to be able to 1: fly, 2: use TNT, 3: use the machine gun, so if it ain't working, before posting a ticket, make sure you have permissions and/or money (if the economy feature is enabled).

Note: On some servers you may have to pay to drop TNT.