Is that how you limeys spell generalization? 
Perhaps he was taken short in his lorry and had to use the loo for a bit. Whilst there, he marvelled at the colours (though most of it was black as tarmacadam) produced by his labours to the extent that he saved a bit in the bin liner. Though it smelled of petrol, he still felt compelled to take it on holiday. While showing it to marvelling spectators at Caravan park, he was accosted by a constable. She was a pretty bird but was not at all impressed at his offal. She checked him into mental hospital as a result. He still resides there, consulting with his vicar and his solicitor daily, and only ventures outside after donning his mac - whether the sky is grey or not.
Har-umph.
Lethbridge-Stewart, DSO, retd.