Needed liquid nitrogen to freeze a rose - to shatter it for a special effects music video scene. Praxair was one of the only places I could find that sells liquid nitrogen to the general public. It took awhile to find the branch with liquid nitrogen. Each Praxair place I went tried to help me find the right location. When I found it, the people were so polite and helpful - and we got the shot we needed for the music video. You can watch the rose shatter on Christine Lee's Music Video Surrender - to be released February 2019 read more