person A: This past weekend I found out a friend of mine I went to school with passed away. He had a heart attack while he slept.
person B: that's terrible! how does that make you feel?
person A: It makes me feel old. I mean I am not that old_comma_ but to see people my age passing away really makes me think about my own mortality. 
person B: That is the reality of life_comma_ unfortunately! That's what you have to enjoy life now.