Whenever I'm about to freeze just about any kind of food, I first put it in zip-shut plastic freezer bag, squeeze out as much air as I can, and seal it tight. Over a period of days or weeks, the originally deflated bag puffs up quite dramatically. I've never tested an EMPTY sealed bag to see if THAT would inflate -- but somehow I doubt it. 

If I place a block on a conveyer belt moving at 10m/s then place that conveyer belt on another conveyer belt moving at 10m/s in the same direction the block would now be moving at 20m/s. We are always told it is impossible to get things quicker than the speed of light but with enough conveyer belts moving at high enough speeds why would it not be possible to get the block moving this fast? All impracticallities aside