How much mountain dew would it take for a person to overdose on caffeine?

Let's say you weigh 150 pounds after 186.14 cans of Mountain Dew, you'd be pushing up daisies. You could drink 132.95 shots of Espresso before croaking.

Tags: daisies,  espresso,  mountain dew,  overdose,  caffeine 
Wednesday, February 01 2012
Source: http://answers.yahoo.com/question/index?qid=20080124175937AAjPtPT