How do I get the "What cat?" achievement?

[GRIDLINES]

I've never managed to get the achievement anyways, but after looking up a guide I still can't figure it out. What do I do?

So far the best of my attempts has been to put a paper box, a plastic container, and a switchboard-radio-thing in that plastic container and ended up with this: http://steamcommunity.com/sharedfiles/filedetails/?id=415369928

How do I break it?

EDIT: Nevermind. I just got it.
http://steamcommunity.com/sharedfiles/filedetails/?id=415371063
^ That was what finally worked. The computer monitor is opposite the Combine charger on the wall.

[Alizarin Crimson]

As far as I know, the object doesn't necessarily matter, you can take whatever you want (I used the cactus and some other small object) but you have to do it over and over and over again. I'd say at least 10 times. At some point Alyx even said "take it easy, Gordon" and then it broke and I got the achievement.

[S]

You just have to keep doing it. Item doesnt matter.