Wobble is definitely The McRip Effect go read that thread.
http://www.youtube.com/watch?v=rwGCu6oM10YTotally McRip effect, right?
Note the surface is the counter beside stove, meaning it is definitely flat unless the worker mess it up.
I'm seriously consider writing a lengthy thread discussion about what McRip effect is and how GeekHack is using it wrong.
Since it is near end of term in Canada (University), I don't have time but a quick run down from what I still remember in my PYSC100 class.
Human are "hardwired" to learn language just like spider can lay web without learning.
The area in your brain that process language in your brain is called Wernicke's area. Link:
http://en.wikipedia.org/wiki/Wernicke%27s_areaQuote from wiki "reflexive mimicking of words and their syllables that associated the sensory and motor images of spoken words."
It means it associated image such as text to the words in your brain.
There is another area in your brain that turn words into sound in your brain.
Combine these together, it the reason you are hearing "voices" when you are reading.
In other words, McRip effect only apply to language.
Unless Human are hardwired to perceive Filco keyboard will ping and wobble, it is NOT McRip effect.
NOTE: I'm way over simplifying things, again I don't have the time.
It have long annoy me that many geekhack member have no idea about actual science, yet try to make it sound like science.