Jerry, a rider on Singapore Airlines flight SQ321 from London to Singapore, described the time the plane plunged as it went through intense turmoil.
The flight was diverted to Bangkok and landed at 15: 45 local time ( 08: 45 GMT ).
Singapore Airlines said the journey experienced” immediate severe volatility” over Myanmar. A 73- yr- old English man died, and seven people were severely wounded.
Officials at Bangkok aircraft said the gentleman “likely” died from a heart attack.