('US') She shifted 'into' low/high 'gear'. = ('Brit') She changed 'into' bottom/top 'gear'. [=she changed to a gear that allows for a slower/faster rate of speed]
This discovery will bring about a 'paradigm shift' in our understanding of evolution. [=will cause people to understand evolution in a completely new way]
We need to 'shift ourselves' [='get moving'] if we're going to make it home before dark.
(..) We should probably get out of here. COBB: You feel that? You have actually been trained for this, Mr. Fischer. Pay attention to the strangeness of the weather, the shift in gravity. None of this is real. You're in a dream. Now, the easiest way for you to test yourself... (..)2010 Inception
(..) before we're totally boxed in. Damn it. You mustn't be afraid to dream a little bigger, darling. We need to shift his animosity from his father to his godfather. - Destroy his one positive relationship? - No, repair his relationship with his father... ...whilst exposing his godfather's true nature. (..)2010 Inception