feignderstand - pretend to understand, especially after someone has said something 3x without you comprehending...hilarious right?

SPF 30 or 55 does not protect 2 or 3 times as much as SPF 15. They come up with these numbers based on how long it takes you to burn. So if you turn red in the sun after 10 minutes without sunscreen, but you just put on an spf 30 on, then you are protected for 300 minutes.  They get these numbers also by slathering on the sunscreen like icing on a cake, so a thin layer like most people have on is usually equivalent to 5 or something.

affronted - saying something in a disrespectful insulting way, intending to insult

Beijing has smog indexes up to 700..or 900..Toronto is like 7.2.