Faul McCartney caught playing guitar right-handed in India on the Anthology.
Another behavior that gives Faul away is his apparent right-handedness. Paul was an incurable lefty.
One of the big areas of controversy in the Paul is Dead conspiracy is which is his dominant hand - is he a leftie or a rightie? Paul is one of the most famous left-handed guitarists in the world and, in fact, in a 1963 interview Paul is quoted as saying the following about it...
"The only thing I couldn't cure myself of was being left-handed. I do everything with my left hand, and no matter how I try I can't change the habit. I just seem to do everything back to front. I used to even write backwards. Every time the schoolmasters would look at my handwriting they would throw swinging fits."
- Paul McCartney [from a 1963 interview]
Here is Paul himself, in his own words and before his alleged death, telling us that he is a devout leftie and that everything he does is with his left hand. Why is it then that in spite of this, there are a number of occurances after 1966 where Paul is picking up and/or holding objects with his right hand? Being a leftie myself, my dominant hand performs such tasks, i.e. my left, and because Paul has also admitted to being the same then his dominant, left hand should be the one seen doing such things. But there are a number of times after 1966 where he is shown in Beatle material doing something that is right-handed. These include: On page 4 of the Magical Mystery Tour booklet Paul is holding his wand in his right hand. At the beginning of the 'Fool on the Hill' segment in the Magical Mystery Tour movie Paul takes the cigarette out of his mouth using his right hand. In the Magical Mystery Tour movie, as the cast are getting drunk and singing on the bus Paul is shown holding his beer bottle in his right hand. In the music video for Penny Lane, Paul appears to take his bass guitar to hold right-handed before quickly correcting himself. On the cover of Abbey Road Paul is holding his cigarette in his right hand. In the booklet for Let It Be... Naked a photo is shown of Paul holding a cup of tea in his right hand. On the Anthology 7 video, as Paul is discussing the song 'I Will' clips are shown of their time in India. Two clips show during this that shows Paul playing right-handed guitar...
There is an unusual scene in the Anthology 7 video / DVD where Paul is shown playing guitar right handed. The particular scene can be found approximately 50 minutes in where Paul is talking about writing the song 'I Will'. This particular song is playing as the scenes are shown. Of course we have to ask why Paul is playing right-handed here. According to the story, Paul's replacement William Campbell was a right-handed guitar play who had to learn how to play left-handed for public appearences. Maybe, since he was in remote India he felt he could let his guard down and play with his more comfortable stance?
Paul played the bass left-handed. Notice how the right hand is on the fret board, while the left hand is picking the strings.
Faul betrays his natural inclination to hold the bass as a right-handed person. Notice how his left hand is on the neck (where it would finger notes on the fret board) and his right hand would be in position to pick the strings.
I'm sure Faul would never actually go on stage & play the bass like a righty, but he's been caught playing right-handed before. This is an official video from from the Anthology and captures Faul playing guitar right-handed:
In this image from the "Let It Be" movie, it appears the pick-guard is on top. It is possible that a right-handed guitar was restrung, but it could also be evidence that the image was reversed.
As mentioned in a previous post, he even folds his arms like a right-handed person.
Faul is shown lighting a cigarette with his right hand. Now it might be argued that a left-hander could light a cigarette right-handed. Maybe, but speaking as a right-handed person who has reasonable control of her left hand, I would not be comfortable using my left hand to put a flame that close to someone's face.
In "Penny Lane," Faul slips up briefly, showing his natural inclination to play right-handed:
Also from "Penny Lane" - Faul drinking with his right hand:
"Anonymous" also pointed out the difference in hands between Paul and Faul: