Yeah we used some once. It froze everything in the cooler solid for 3 days.

Ditto on what some said in an earlier post, If you do use it make sure it is in a well ventilated area. Carbon Dioxide will deplete the oxygen.

we used it to kill the bird just before we shot it into the turbine engine for faa cert the bleeding haerts was the only way we could do it it taks the oxygen away in a cooler

Can't dry ice burn the skin?!