You get in the bus and you see that there is only one seat left. Next to it is a very large woman, she's probably more than 500lbs, and she takes almost both of the seats. Since you're tired today, and feeling a bit adventurous, you decide to sit next to her. She tries to shift a bit to the side to make some room for you, but she fails. You have a tiny fraction of the seat to yourself. The lady is clearly embarrassed about how much space she takes up, but she says nothing.