What are they looking for?

On page 56, Golding tells us that Simon "looked over his shoulder as Jack had done at the close ways behind him and glanced swiftly round to confirm that he was utterly alone" (Golding & Epstein, 1954).

• Do Jack and Simon have the same feelings and motivations for this similar behaviour, or different? 
• What is each looking for over his shoulder? 

This question arose out of something that came up in one of your essays, and I think it's important enough to discuss. So, what do you think? What can we make of the comparison that Golding makes here between Jack and Simon? 

__________

References

Golding, W. & Epstein, E. (1954). Lord of the Flies. New York: Perigee.