Okay, let's explain how to set this up and how to use this.
mcMMO is a rpg skill feature that allows you to level up your skills. Acrobatics is one of them. Each skill (they have about 15) allows you to get some perks. For example; mining gives you a few double drops, and acrobatics gives you rolling and a bit of damage control. Very handy if you run around a survival world all clumsy. Each skillname is also a command, like /mining, and .. /acrobatics.
When you type: /acrobatics, you will get a scoreboard on the right, type: /mcsb keep, to keep the scoreboard up.
To get exp for acrobatics you have to fall a certain height.
@globug100 made a very pretty and cute flower-tower that we can jump off of. Don't worry, you won't die. Another condition is that you have to be in survival mode, and not in god mode. So if you're a special group or a team member, make sure you have god and fly disabled, and that you are in survival mode. If you fall from level to level the exp in the scoreboard will get less and less, until you are at zero, after which you level up. This is a great way to tell if you're scoring exp for dropping down.
There's water all around, if you fall by accident hopefully you stay alive by falling in the water. Just /back to otherwise pick up your stuff.
You get more exp if you wear boots as armour with the enchantment feather falling iv. I've put a shopchest at the bottom of the flower where you can buy a book. There are also anvils there. Leather, iron, gold, it doesn't matter what the boots type are.
Another protection is a regeneration beacon I've installed. You should automatically get regeneration buff.
The last way to stay alive is to pick up the health potions we are dropping and splashing them. If the effect doesn't work, type: /pvp on, first.
One more thing, to share the exp with others, make sure you're in the mcMMO /party, if you're not, ask for an invite.
Okay, you're ready to go, just jump from leaf to leaf until you're at the bottom, and type: /warp acro again.
At the top there's a special acrobatics spawner guarded by the mcMMO guy, which will drop health potions, parrots, food, .. all sorts of stuff. Oh, a little tip: the parrots are special, if you kill them you get feathers and money.