When people attribute someone's untimely death to a Coke overdose, they're usually not talking about the world's most popular soda.But experts in New Zealand say Natasha Harris' 2-gallon-a-day Coca-Cola consumption "probably" contributed to her death. The soda company responded to the alleged connection by noting that even water consumption can be fatal in excessive amounts. "The first thing she would do in the morning was to have a drink of Coke beside her bed and the last thing she would do at night was have a drink of Coke," Harris' partner Chris Hodgkinson said in a deposition. "She was addicted to Coke." Hodgkinson testified that Harris drank between 2.1 gallons and 2.6 gallons of Coke every day. The 30-year-old Harris died of a heart attack in February 2010. According to New Zealand's Fairfax Media, pathologist Dr. Dan Mornin testified on Thursday that Harris likely suffered from hypokalemia (low potassium levels)...