Why was my pasta sauce squealing?!
However after several hours of listening to this eerie wail I realized that even my crazy neighbor probably wouldn't voluntarily select it for entertainment, at least not for so long. I looked out the window in hopes of finding some mutant songbird to throw a rock at (kidding, kidding) but there was nothing. Then my cat knocked over some pens and as I was leaning over to collect them I realized that the noise was getting louder. After picking up each of the various items on my desk and holding it to my ear (I must've looked pretty strange standing there intently listening to scissors and bananas and envelopes) I found the culprit: a delicious jar of Dolmio Light Chunky Bolognese Sauce.
Answers: As I was sitting at the computer early this morning minding my own business I noticed a high-pitched squealing noise growing gradually louder. After searching high and low for the source of the sound, I chalked it up to my Turkish neighbor's notoriously "eclectic" taste in music and tried to ignore it.
However after several hours of listening to this eerie wail I realized that even my crazy neighbor probably wouldn't voluntarily select it for entertainment, at least not for so long. I looked out the window in hopes of finding some mutant songbird to throw a rock at (kidding, kidding) but there was nothing. Then my cat knocked over some pens and as I was leaning over to collect them I realized that the noise was getting louder. After picking up each of the various items on my desk and holding it to my ear (I must've looked pretty strange standing there intently listening to scissors and bananas and envelopes) I found the culprit: a delicious jar of Dolmio Light Chunky Bolognese Sauce.
As microbials consume food, they exhale gases. Yeasts consume sugar making ethanol (beer, wine) and carbon dioxide. As the gas built up in the jar, it began to escape.
Be glad there was a pressure release in the jar. It might have exploded from pressure build-up had there not have been.
I think you have answered your own question. As the sauce was going off it would have been building up gas, and you would have heard the air escaping.
That is called A Lesson Learned my friend! The sauce emitted gasses as it fermented after being opened, the whistling you heard was the gas escaping (or trying to). When it blew out in your face it was the release of pressure after opening. Always refrigerate after opening LOL!