That is so new, I've never heard it before! Pretty sure it's a myth anyway, added to the fact that broken leads flying around in zero gravity pose a problem too.
Anyway...
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Time: After the football Ireland v France and the Henry, handball incident
The French President was sitting in his office when his telephone rang.
'Hallo, Mr. Sarkozy!' a heavily accented Irish voice said. 'This is Paddy
down at the Harp Pub in County Clare, Ireland. After the cheating in the
football, I¹m ringing to inform you that we are officially declaring war on
you!'
'Well, Paddy,' Sarkozy replied, 'This is indeed important news! How big is
your army?'
'Right now,' says Paddy, after a moment's calculation, 'there¹s myself, me
Cousin Seán, me next door neighbour Seámus, and the entire darts team from
the pub. That makes eleven!'
Sarkozy paused. 'I must tell you, Paddy, that I have 100,000 men in my army
waiting to move on my command.'
'Begorra!' says Paddy. 'I'll have to ring you back.'
Sure enough, the next day, Paddy calls again. 'Mr. Sarkozy, the war is
still on. We have managed to get some infantry equipment!'
'And what equipment would that be Paddy?' Sarkozy asks.
'Well, we have two combines, a bulldozer, and Murphy's farm tractor.'
Sarkozy sighs amused. 'I must tell you, Paddy, that I have 6,000 tanks and
5,000 armoured personnel carriers. Also, I have increased my army to 150,000
since we last spoke.'
'Saints preserve us!' says Paddy. 'I'll have to get back to you.'
Sure enough, Paddy rings again the next day. 'Mr. Sarkozy, the war is still
on! We have managed to get ourselves airborne! We have modified Jackie
McLaughlin's ultra-light with a couple of shotguns in the cockpit, and four
boys from the Shamrock Bar have joined us as well!'
Sarkozy was silent for a minute and then cleared his throat. 'I must tell
you, Paddy, that I have 100 bombers and 200 fighter planes. My military
bases are surrounded by laser-guided, surface-to-air missile sites. And
since we last spoke, I have increased my army to 200,000!'
'Jesus, Mary, and Joseph!' says Paddy, 'I will have to ring you back.'
Sure enough, Paddy calls again the next day. 'Top o' the mornin', Mr.
Sarkozy! I am sorry to inform you that we have had to call off the war.'
'Really? I am sorry to hear that,' says Sarkozy. 'Why the sudden change of
heart?'
'Well,' says Paddy, 'we had a long chat over a few pints of Guinness and we
decided there is no way we can feed 200,000 prisoners.'