Poll: What did you think of this article?

I'm trying to work out what the commnity finds interesting. I've made a few submissions that got lots of up-mods (thank you!) and many that have sunk without a trace. I regard this as to be expected.

However, further to increase my, and perhaps your, understanding of what makes this place tick, I'd like to ask about a submission I made a couple of days ago. In particular, what was your reaction.

It was about tapping a coffee cup, something you can probably do within 30 seconds of reading the items, and which contains what is, for many, a mystery. So, here are my questions: