The sudden decompression will cool down the CO2 rapidly. To the point where it will become dry ice. This will slow down the release speed significantly. It is s

The sudden decompression will cool down the CO2 rapidly. To the point where it will become dry ice. This will slow down the release speed significantly. It is still not nice and probably a risc, but not als large as you estimate. Actually you can make dry ice like this: get a CO2 cinder upside down and open valve into a cloth bag.