Just in case it never occurred to someone, I had a mystery point impact crack on my phone screen (fortunately just on the tempered glass screen protector). I think it may have been due to stepping off the seat at a light and then pressure or banging it against the nose of the saddle, in my rear pocket. Maybe I leaned back on it, and I've noticed since that I do that now and again. In any event, phone in only the front pocket now and never the rear.