If you drink a lot of Mountain Dew can you die?

It's a broad question, but it's possible. It's possible to die from drinking too much water too, and that has happened at college hazing sessions. As far as closer to your question, there has been a report of a person that died from drinking too many energy drinks, in too short a period of time and suffering a heart attack. So, yes, it's possible to die from drinking too much Mt. Dew.