awhile back, i heard about a drill to increase swing speed of taking a shaft without a head on it and swinging it with just the left arm as fast as you can, i tried this before a round, and was really killing the ball for the first 6 holes, on the 7th hole i teed up a drive to hit a little draw, when the club passed through impact i felt my left arm tear, or pull out of socket and i couldnt complete the round without every shot hurting. Im not sure if the drill i did caused this or if its something in my swing that is causing it, at the top of the swing i dip down and tend to get the club stuck behind me and under plane consequently violently flipping the club through impact inside out. its been about 3 months since it first happened and i seem to be able to hit all clubs now except as soon as i tee up the driver I can't make it through to the finish and with severe pain. as a competitive golfer this really worries me i dont wanna be relegated to 1 irons off the tee forever. has anyone else experienced this? reminds me of 1-d regarding structure