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Portal 2 Hints
Item Flinging Tip
1 of 3: After you pick up an item (such as a storage cube) by facing it and pressing the "Use Item" key, you can fling it a short distance by releasing it while moving your view left, right, up, or down.
2 of 3: To increase the distance of the fling a bit, be moving forward at the same time you're turning. (That works best when flinging things up.)
3 of 3: Flinging an item like this is never required, but can sometimes come in handy for tricky situations or minor shortcuts.