I just saw one of the most beautiful greenslips I've ever seen.
3-day GS. 1 leg to overnight. 30 hour layover. Double deadhead home. However, you could just iron man it (and I think they did) it back on first flight of the morning. 31.5 hours of pay on 1 leg and gone less than 12 hours.
That's how scheduling could get some trips covered when a 2-day GS just isn't enough. I've got a 1 leg trip....... I'll give you 30 hours at the hotel and a deadhead wink wink home.