We actually use liquid CO2 during one of the many distillations for the Zero stuff. We use it as a shock catalyst to draw more of the sugar away from the capsaicin, leaving it substantially hotter. Just be careful, I actually suffered a rather large cryoburn a few years ago when one the the o-rings burst, covering my lower arm in liquid CO2. It was kind of cool, seeing the skin turn black in a day or so, but I wouldn't suggest doing it on prupose.