Feeling A Bit Twitchy

Over the last few rounds, I appear to have developed a strange golfing affliction: I'm having serious difficulty in actually being able to swing the club back and away from the ball in order to start my backswing; as a result, I spend ages twitching and wiggling while trying to get the club to move and my partners Henri & Phil are wetting themselves with laughter / sympathetically suggesting remedies.

Once I manage to actually take the club back, most times my shots are no worse than usual and my overall scores are not too bad and my struggles are certainly providing some amusement for anyone unfortunate enough to witness them!

Any golf psychologists out there got any solutions? At least the weather was nice!