1. Arrows shot in the same direction at the same power will always land in the same position. This is done by changing the arrows initial velocity to the players direction vector (where they're looking).
2. Bow boosting will always occur in the exact direction the arrow hits you. This mechanic does not apply at all to shooting other players/entities, it is only triggered when the shooter is the same as the player being shot.
Commands:
None.
Dependencies: None, it is a basic event-based plugin.
Here is a demonstration of the second mechanic, the first one is pretty self explanatory: