Mural detail, zipper or chest burst?

Was going through the mural again and found this: [IMG]http://i105.photobucket.com/albums/m217/Macs_05/ApolloPrometh.jpg[/IMG] -Is it a big suit zipper, a "chest burst" scar, or nothing in particular? If it is a chest burst scar, then "Apollo", The Blue giant, SJ, engineer, "Titan" (or however you want to call him) pose is that of awakening the creature (as it seems it is asleep with eyes closed). He's posing like: "wake up you lazy motherf*&%$#".... I mean, that animal could easily be a defense mechanism and the mural a warning to stay away for your own good... -My apologies if this has been posted before, but I can't find the search function for the forums.