I left a bottle of wild cherry Pepsi in the freezer to cool and forgot about it over night. When I remembered to check it the Pepsi was entirely frozen and the bottle it was in thankfully did not explode.
When I opened the Pepsi it began to fizz and bubble at the top even though there was no liquid present in the bottle as it was entirely frozen. The fizz and bubbles were a thick very sugary syrup that was not the same temperature as the rest of the ice. I noticed all over the bottle this syrup was being forced to the top where it even burrowed holes in the ice to get out. Eventually all of the carbonation seems to have escaped from the ice along with most of the sugar and coloring.
Below are two pictures trying to mark the event:
Does anybody have any idea at all why this happened? My understanding is the $C O_2$ was just trying to escape the ice since it couldn't when the crystals formed since the bottle held and the pressure stayed contained. However, I have no idea how this tunneled small holes in the ice and why the sugar and coloring almost all got pushed out too, I have never seen something like this happen before.