A 16-year-old South Carolina teen died last month from ingesting too much caffeine, according to the Richland County coroner.

Davis Allen Cripe died from a “caffeine-induced cardiac event causing a probable arrhythmia,” according to Richland County Coroner Gary Watts. The teen ingested the caffeine from a large Diet Mountain Dew, a cafe latte from McDonald’s and an energy drink over the course of about two hours, Watts said.

While many may worry their caffeine consumption could put them at risk, the average person who drinks a cup or two of coffee has nothing to worry about.

Here’s a look at what can happen if you drink too much coffee: