LOL there is no jetpack in the code are you people dumb, as many people who has got inside the code and looked and has found NO jetpack, yet you still believe there is.
I personally find this theory a stupid one. Just because people can't find something in the games code, doesn't mean it doesn't excist. Who says it's not named different? Maybe R* was smart enough to hide this in the games code. No one know, except R* themselfs. Who are either laughing their asses of at all of us trying to find it when it doesn't excist, or appriciating our dedication on unraffling this mystery.
So in short, please stop complaining in threads of people trying to decode this mural just because you have a different, non proven, opinion.