The entire skirt did not come off, only a portion of it directly below the passenger side rear door. I was able to pop it back in, but have been watching it for the past few days, and no I was not kicking off any ice to trigger it popping off, I believe that the chassis flexing over a speed bump is what triggered it to want to come free. Hopefully this is an isolated incident, and to be honest I had one of those 'I am not even mad, I am impressed' moments because of how cold it was here in Pittsburgh last week. Cheers