<human>: Can you condense the text into a few key points?

Now, it's been a while since I've studied Physics or mechanics... But if you were to fire some celebratory rounds (for example, having just overthrown a dictator... or finding out that your first cousin isn't pregnant with your baby) do you not run the risk of being showered with bullets returning back towards the ground?

From a model point of view with no other forces beyond gravity affecting the bullet beyond the initial velocity, if the shot was fired directly upwards, gravity would decelerate the bullet to v=0, where it would then turn and drop, eventually landing where you are stood, with a velocity equal to which it was fired... Either this, or I'd settle for "they magically disappear"
<bot>: Surely shooting gunshots wildly into the air will mean they drop back to earth, spraying everyone around you like a Romans 12:19 drive-by.