Has anyone seen grand-dad?

We've all seen the film 'Home Alone' and thought to ourselves, "how could anyone ever be so forgetful, to leave their own son behind when departing for a long earned holiday." Well, according to a mate of mine, NSW-based travel writer David Ellis, the following par, which he e-mailed to me, is TRUE:
Car rental companies are used to finding some unusual – and often embarrassing – lost-property in returned vehicles, but Managing Director of Holiday Autos, Chris Hamill says top accolade for 2007 has to go to a family who had to rush back from checking-in at Palma Airport in Spain… after realising that in their haste to get their flight to London, they’d left in the back seat of their rental car their elderly grandfather.