明報: 年輕技工夢中猝死！我想知: 究竟佢係發夢,夢見佢死咗, 定真係死架

佢係訓訓下死左..
明報咁講只係想吸引讀者.

It can divided into two parts to answer your question:

1. It is the way how the newspaper to make alarm and catch the reader's eye, the report was downloaded as below:
年輕技工夢中猝死
(明報) 05月 23日 星期五 05:05AM

【明報專訊】一名被家人指不煙不酒，為人上進的香港迪士尼 樂園年輕技工，昨清晨在馬鞍山利安寓所熟睡期間突然抽筋，妻子驚覺丈夫臉色轉紅及呼吸困難，並已陷入昏迷，急忙報警求助，惟男子送院後返魂乏術。
夢中猝死男子練×豪（27歲），與家人居於利安利盛樓一單位。據悉練較早前在內地結婚，其31歲姓李妻子暫未獲批來港定居，但不時申領雙程證來港與夫相聚。事發於昨清晨6時許，李婦擬叫醒丈夫時，發現其身體不尋常地抽動，臉色發紅及呼吸困難，並已失去知覺，立即通知屋內親友並報警，惟他送院搶救後不治。

2. The sudden death during sleeping seldom happens in an adult, it is quite frequent attack a newborn. In an adult, sudden death usually is usually due to the cardiac attack which is fetal usually.
There are some comments from a doctor on that incident.

伊利沙伯醫院心臟科高級醫生何鴻光表示，約七成猝死個案與心臟問題有關，但真正死因需剖屍確定。他指出，年輕人猝死事件較少見，當中有可能是由被忽視的外傷引致，另外亦可能是腦血管畸生或患有隱性冠心病，因此忽然病發而死亡。但是，醫學界過去亦發現不少全無因由的死亡個，謎團待解。

Hope it can help you.