From a mail I received : "A month ago, many of us heard about the sad demise of Ranjan Das ( CEO of SAP, India) from Bandra, Mumbai. He was very active in sports, was a fitness freak and a marathon runner. It was common to see him run on Bandra's Carter Road . Just after Diwali, on 21st Oct, he returned home from his gym after a workout, collapsed with a massive heart attack and died". My friend who mailed me this had a specific cause to attribute for this untimely, unfortunate death. Can you guess, please?