How to lock a photo so that when I touch the screen, nothing happens? (iPhone)?

I've got an interesting question for you today. This is an iPhone question. Is there an app out there that I can use to stay locked on a photo I'm selecting for a period of time, or until I hit the home button, etc?

For example I want to show my friends a photo on my screen and even if they touch the screen, it I don't want the photo to zoom, change, or the header menu to drop down, until I press the home button.

Let me know if I can be any clearer.

No, I don't believe this is an option, outside of something like instagram. I would just show them the picture and not let them touch the phone.