Inflection
I work with a guy who's been doing a really weird thing lately.  He calls a lot of people during the day and leaves a lot of messages.  At the end of his messages, he says something like, "Call me back when you get a chance.  Thanks.  Bye."  When written out, this is normal.  But the way he says it is really weird:  His inflection on "bye" goes down to up, instead of up to down.  Try it.  It's totally unnatural. #language

Volkswagen Golf Harlequin
In 1996, Volkswagen produced 264 multicolored Golfs called Harlequins.  They featured bodies with each panel painted a different color, including red, yellow, mint green, and blue.  These colors were chosen at random during production so that no two cars looked exactly the same. 

I always saw one of these cars when I was going to school in Hoboken.  I figured someone had some time on their hands, so they painted their car several different colors.  I always wondered what they said when someone asked what color their car was.  "Red...ish".  What did they have on their registration?  "Color:  Multiple"?  Anyway, I saw the same car on the streets of Dover after I moved an hour west of Hoboken to Randolph.  It wasn't that big of a deal, because I knew a bunch of people who went to school in Hoboken and moved out near Randolph to work near me.  But what was weird is that I would occasionally go back to Hoboken for various reasons and I would see that car in a parking spot.  What were the chances that a person went to school with me, worked with/near me, and went back to school at the same time as me?  Needless to say, I was slightly freaked out.  Now that I know that there are several of these cars, I no longer feel like someone's stalking me. #travel