Well, what did you think I was talking about.?
I extended the height of a balcony railing 8 inches for people with cats so the cats can't jump over. 
The panels flip down and have a top stiffener and latch hooks and eye bolts to hold them in the upright position.
PS IT WAS RAINING
TOO WET TO SMOKE EVEN IF I WANTED TO
(Which I Didn't)
Hoggie can jump a 6'fence.
This has a big drop on the other side of the railing.
Cat's aren't stupid.
I have a bar height dining table - about 3 feet high. If I am sitting at the table sometimes my cat will jump up on a chair and sit and watch me. One day I had my purse in her chair and she decided to jump on the table. When she did, she landed on a placement and surfed on it all the way across the table and jumped off the other side. By the time I stood up, she was sitting under the table cool as a cucumber acting like Ms. Innocent. She hasn't jumped on the table again.
Jennifer-Quit-05-01-14 That is really cool...I don't have a deck any more, I have a stupid little wooden "fence" that is where the door opens from the living room to the outdoors...it is VERY high but I am not sure my cats are smart enough not to jump off.
How high can cats jump Dale?