Got Momma out of bed this morning and went for a short ride and to breakfast at Bob Evans. Had to put the top up as it was 44 degrees this morning. Kept hearing this thumping noise that sounded like it was coming from inside the dash. On the way home from the restaurant, I noticed that I had forgotten to latch the top at the windshield frame! Reached up, turned the lever and the thumping noise disappeared! What an idiot!! Good thing the windows were up and that I did not get the car up to speed...