[Jeff Higgins]

We call it "stock crawling", where a shooter inches his face too far forward on the comb of the stock to "see better". As others have noted, that's not how rifle scopes work. They are designed so that the full field of view is achieved with the eye several inches back from the ocular lens. Quite unlike binoculars, telescopes, and cameras, so they kind of confuse some people. Most people only do it once, though...