Ordinary World

Journey back to Pride Rock
Meet Jim.
Jim's an ordinary guy.  He wakes up, gets ready, reads the paper and feeds the dog.
He catches the subway by 7:05, goes to work, 8-4.
He makes it home by 5 to eat the dinner Lisa has on the table.
He works in the garage like men do, then plays with the kids for a while. 
Comes in for a shower, and gets ready for bed.
One particular Tuesday however, the subway is late.
He checks his watch to see if he's just early, 7:05. 
But as he looks closer at his watch, he sees the impossible.
A reflection of his father stares back at him from the watch.
He quickly turns around to find him, and sees him staring from the stairs.
He does a double take, and knows what he must do..

What does Jim must do?
Why is seeing his father "the impossible"?
Does he catch the subway?