broken window

I run a delivery service and one of my drivers just called and said the drivers side window just imploded.  Is this something that cann happen of is she full of it.  If it can happen how do I prevent it from happening to all my other ford trucks
 
Thanks for the help

Only way I've ever seen that happen is by either an outside impact on the window, or with the window partially down and closing the door by pulling on the window.