Here’s an Internet time waster right up my alley. It’s an on-line lethal caffeine dose calculator. Have fun. I did the calculation by Starbucks coffee, my drug of choice, but there are a variety of other beverages (yes, including Mountain Dew). There were also a couple of other tabs that I did not follow (e.g. death by Penguin Mints and energy drink ingredients) that I plan to drop back to look at.