A passer-by watched two Irishmen in a park. One was digging holes and the other was immediately filling them in again.
'Tell me, 'said the passer-by, 'What on earth are you doing?'
'Well, 'said the digger, 'Usually there are three of us. I dig, Fergal plants the tree and Sean fills in the hole.
Today Fergal is away unwell, but that doesn't mean Sean and I have to take the day off, does it?'