Why is the Rock in my Backseat?

THIS IS THE rock I found on the backseat floor of my VW Golf III GTI (not as cool as it sounds -- it's a 1991 model) last Thursday evening. Why is was there is a bit of a mystery. Unfortunately, how it got there is not -- it obviously came through the massive hole in my back passenger side window.

So now I'm driving around the Cote d'Azur with a black plastic bag covering one window in a sporty little car that sounds like it's ready for a drag race -- you know, because the tailpipe fell off last week.

But no worries, the muffler is scheduled to be fixed on Wednesday and the window perhaps a bit later in the week. Thank goodness for the latest 5-day forecast: sun, sun, sun.