I'd be more afraid mechanic didn't leave it loose but actually damaged/stripped the threads out. I'd definitely look at this carefully during the off season. It's not uncommon for a bolt to thread even though it's really strippped out. Next thing you know you hear another pop but this time your 50 miles away. IIRC torque is around 115 in lbs for 14Rs... not much room to play for hand tightening.