My husband and I noticed the same thing over Dallas the other night--the moon was perfectly horizontal with no tilt. We've noticed numerous times in the past that it's been more and more horizontal, but as OP stated, this is the first time it was a perfect 'smiley face' smile. I'm 60; he's 63 and we've been observing the moon for a very long time--it's only been in the past couple of years that we've seen this drift toward the horizontal. The moon has always before, in our experience, waxed and waned to the right and left, with a vertical crescent like a parenthesis ')'.