Im looking for a plugin tht teleports u back to a certain location when you fall on a selected area

Im looking for a plugin tht teleports u back to a certain location when you fall on a selected area. Anyone comment a link for a plugin like this?

Like the one on play.mc-sg.org has on parkour when you fall

 

Multiverse-portals, or any other portal plugin can do that for you.

 

And this brings up another question

And this brings up another question how to do you go through a portal in a world and when you go through you it you end up in the same world but different coords

ive bin searching fro a while but i no find anythin' useful

EDIT by Moderator: merged posts, please use the edit button instead of double posting.

 

Step 1: Get a portal plugin.
Step 2: Read the documentation.
Step 3: ?????
Step 4: Profit.

 

http://plugins.bukkit.org/

Look it up on here, next time - read the headings of the website.