World's Deadliest Joke Revealed

Something people say which has never made sense to me is that the pen is mightier than the sword but good luck if you find yourself in the situation when your opponent has a sword and all you have is a ballpoint because that isn't going to end well for you.
A quick google shows that the famous saying signifies that the power of writing is eternal, while the violent power of the sword is short-lived which doesn't alter the reality that if you have a biro against a cutlass you not generally in control of the situation but words do have power to kill as one Greek
philosopher, Chrysippus of Soli, found out in 206BC when on hearing a joke, laughed so much that he dropped dead.
Now i legally am unable to tell you what the joke is in English in case it falls into the wrong hands but due to the deadly nature of the joke, during the First World War the British Army tried to militarise it and had it translated into German for the men going over the top to read out as they ran through an open field amid artillery fire while shouting the joke at the Germans but due to the Germans having absolutely no sense of humour and being completely impervious to joke warfare, they just shrugged and mowed down the advancing Tommies in their thousands.
The 11 word joke is said to have been deemed so funny that under the Geneva Convention it has been banned along with Chemical and Biological weapons and the only remaining surviving copy is currently sealed under concrete in a secret location, known only to the Prime Minister, in Shropshire but i can reveal that it includes a donkey and some figs and caused Chrysippus to suffer such a  laughing fit that he collapsed and started foaming at the mouth and then died but even revealing that much has sent my blood pressure dangerously high and i will need to seek urgent medical attention.  
There’s also a suggestion that Chrysippus was absolutely off his face on undiluted wine but i am not going to take any chances and propose to give the punchline to seeing the donkey eating figs in the Ancient Greek text, if you want to translate it then i am not responsible for any following consequences.
On seeing a donkey eating figs, someone said to Chrysippus 'Τώρα δώσε του λίγο κρασί να ξεπλύνει αυτά τα σύκα'.
You have been warned, these words can literally kill.