At the end of Act 1 of most levels, after you defeat the miniboss, the signpost falls out of the sky like so:
You can bounce the sign around for some extra points, which is great. But sometimes when it hits the ground, an Item box will pop up, allowing you to grab some extra rings, an extra life or a shield powerup (for the next Act).
But what determines when the item boxes appear? Is it random? Or is the chance affected by other things? For example,
- Do only certain levels give item boxes?
- Does bouncing the signpost around a few times affect the outcome?