Recently, I flew on UA from ORD - SEA. Of the 2 over the wing exit rows ( 15/16) only one seat was taken. In the event of the doors needing to be opened, I would like to know who is responsible. I politely asked if I could move from row 17 to row 16, but was sternly informed by the flight attendant that those rows had extra leg room and would cost an extra $59. My thoughts....give me a break! Are the airlines that petty not to give anyone a $59 "OP-UP"? Comments welcome!