He looked at his watch. 15 minutes had passed.

[alpacinou]

He got life for killing his daughter. The first day in prison seemed surreal. He looked at his watch. 15 minutes had passed. Great. 15 minutes down, an eternity left.

 

[Charlie Bernstein]

He got life for killing his daughter. The first day in prison seemed surreal. He looked at his watch. Fifteen minutes had passed. Great. Fifteen [STRIKE]minutes[/STRIKE] down, an eternity left.

Or: an eternity to go.

It's good.

We usually spell out single-word numbers (even the ones with an article in front of them, like a hundred), and sentences always begin with capital letters.

 

[Tdol]

How about was surreal?