Ball falls off tee mid swing...ruling?

P...bob's quoted the correct references but I don't think he's necessarily applied them to your situation correctly.

as you missed the ball everything hinges on whether you changed your mind about actually hitting it and made an attempt to change your swing to miss it. for most people they would have to do this to completely miss a ball that's just fallen off a tee unless they tee it up miles!

if this was the case then you are considered to have checked your swing despite the club head passing the ball - this is what 14/1.5 tells us. no penalty, no shot counting, re-tee ball.

on the other hand, if you tried to miss the ball but still made contact you are stuck with the outcome.

PS If this is how everyone interpreted p...bob's post then I apologise to Maninblack...