I'm tired of being out done by all the Japanese overclockers, so I decided to do an extreme experiment of my own. First I used dry ice and got fairly good results, taking an unlocked P4 up to 2GHz. Now I would like to go even farther. Does anybody know where I could buy liquid nitrogen? I was thinking a medical supply center, but I don't know how much it costs, and how quickly it evaporates. I'm not too familiar with handling precautions, but I would think glasses, gloves, and heavy clothing in case of splashing would be prudent.