Ha fucking Ha
I did a job at a remote country house a few years ago, supplying a generator, site lighting etc etc for a posh wedding (it was a National Trust or Heritage building or somesuch).
There were two of us on it, with nothing to do but sit around babysitting the genny in case some twat hit the emergency stop button, and after a while we were getting bored so decided to stroll the grounds in the dark.

Marvelling at the stars above, we wandered about a huge lawn, our night vision seemingly enough, no need for torches. Suddenly my colleague disappeared. He was there, then he wasn't. I swear we stopped to look at the night sky, I asked him a question and got no reply, looked over and he had completely disappeared.

Obviously I shat myself, a joke's one thing, but I know he hadn't run away, he wasn't crouching down trying to fool me, aliens had obviously got him. Instantly deciding he was history, and not wanting to be next, I prepared to leg it back to the marquee when I heard a whimper.

Finding my torch, it turned out that my mate hadn't been abducted, he had taken one step more than me when I stopped and gone straight over the edge of an 8' Ha-Ha, the existence of which we were blissfully unaware. Luckily (?), he only broke his ankle, not his fucking neck, and was so shocked he didn't even cry out as he fell.

Moral of that story? Humans' night vision is shit, no matter how well-adjusted you may think it is. That's why torches were invented.
Oh, and one day I'll have a garden with a Ha-Ha, it must have been fucking hilarious to watch.
(Rsoles, Sat 25 Jul 2009, 14:44, 6 replies)

Ha ha
Whats a ha ha?
(loopy1978, Sat 25 Jul 2009, 20:52, closed)

FFS
Does your computer not have Google?
(Rsoles, Sat 25 Jul 2009, 23:27, closed)

a "ha-ha":
It's a sort of 'invisible wall', designed to keep livestock away from your stately home or ornamental garden; without the visual intrusion of a traditional fence between the lawn and the grazing. It works, effectively, as a small cliff; or a shear fault.

The ground is level, suddenly drops a few feet, then carries on at a lower level. Note that this arrangement is only inconspicuous when viewed from the 'posh' side, looking from the 'plebian' side it's quite visible.

en.wikipedia.org/wiki/Ha-ha for better detail
(The Incredible Sulk Finally remembered his password on, Sun 26 Jul 2009, 1:03, closed)

and from the top of the Wikipedia page
"Ha-ha
For other uses, see Haha.
Not to be confused with laughter."

Lolz.
( Sextant goes to him is emotionally erect, on this day, Sun 26 Jul 2009, 2:40, closed)

So, when you got your stately home
and your nice garden with the ha-ha, you'll need to set up infra-red CCTV. That way you won't miss anything.
( Sextant goes to him is emotionally erect, on this day, Sun 26 Jul 2009, 2:41, closed)

Yep
I'll need CCTV too, like Tony Montana, because if I end up with a Stately Home it'll be thanks to the proceeds of crime.
(Rsoles, Mon 27 Jul 2009, 17:31, closed)