Dying of laughter?

[SamIam]

Apparently people can and do die of laughter. I find this rather hard to believe, but that's what the following news snippet claims:

It appears that people can and do die of laughter. The 3rd century BCE philosopher Chrysippus, for example, is said to have laughed himself to death while watching the antics of a drunken donkey; and in 1410, Martin I of Aragon succumbed to a combination of indigestion and uncontrollable laughter. More recently, a UK man died of heart failure after laughing for 25 minutes at a TV show featuring a Scotsman in a kilt battling a vicious black pudding.

http://encyclopedia.thefreedictionary.com/Died+Laughing