Evolution

While I was strolling along the Bund today, an overcast and gloomy sky quickly became a pouring rainstorm. But, silly me, I had forgotten my umbrella! Luckily, an umbrella salesman quickly ran up to me and shoved a couple of options in my face.

Me (showing off my minimal Chinese skills): Duoshao (How much)?
Him: Ershi (20) kuai.
At this point I gave him a quizzical expression and started to walk away, knowing full well that I would not get drenched because...
Him: Shi (10) kuai.

And that, my friends, is why I am dry AND using the internet essentially for free.