Well, that's official then: recreational drugs can be useful for the purposes of creative endeavour, but it's clear that if you take quite a lot of 'em, and then you climb on a bus with a camera crew, film everything that happens and release the result as a film, this is going to make you look like a complete arse until the end of time.
Possibly others who sat through the documentary Magical Mystery Tour Revisited (Monday, Prime) came to a different conclusion than I did - just so we're clear, the Beatles' Mystery Tour is still utter crap, magical or otherwise - and if you did decide differently, you must be on drugs too.
The year 1967 had been so good to the Beatles until they climbed on that bus too. As this BBC documentary pointed out, for most of the year that the Magical Mystery Tour was made, the drugs were indeed working for the Fab Four. They had recorded and released yet another string of landmark singles: Strawberry Fields Forever, Penny Lane, Hello Goodbye and All You Need is Love, and they'd played to the first satellite audience in history. They had also made a little LP you might be familiar with called Sergeant Pepper's Lonely Hearts Club Band.
And then, stoned out of his gourd, Paul suggested they should fill a bus full of actors, drive to Britain's West Country, film the trip and release it. The others, also stoned out of their gourds, agreed.
Actually, you can't just blame the drugs, you have to blame the money as well. The Beatles were not only loaded in 1967, they were loaded too - which is an even worse combination.