It wasn't that hot. It was good, just not that hot. Its actually not 4 mill. It has a a few drops of a 4 mill SHU extract in there but the sauce itself is not 4 mill. Mamba is hotter than Z (according to Cajohn's...who make both), and Mamba wasn't that that hot for me either. I guess Demon Ichor has spoiled me. Its rediculous and I have a pretty heat resistant tounge.