This is the bizarre moment water left in a car overnight freezes instantly when shaken. <br /><br />The footage was captured in Chester County, Pennsylvania.<br /><br />The filmer explained: "The supercooled water left in my car overnight isn’t able to form ice until it is agitated, giving ice crystals something to form on.<br /><br />"Once they do, the chain reaction of ice crystallization is instantaneous."<br /><br />The footage was filmed on December 16, 2017, but has recently emerged online.
