My initial query:
If a Barbarian charges an opponent during his turn with a basic attack or at-will attack (i.e. Howling Strike), his turn ends after the charge is resolved as per the rules of charging in the Player's Handbook.
If the Barbarian in question kills the enemy with this initial charge described above, he triggers his Swift Charge ability.
Swift Charge
As your foe falls, you rush toward your next victim.
Encounter Primal
Free Action Personal
Trigger: Your attack reduces an enemy to 0 hit points
Effect: You charge an enemy.
First published in Player's Handbook 2.
Since the barbarian already charged and his turn would end, can he still take advantage of the Swift Charge class feature as a free action? If the barbarian can, and since it is a free action to do so, can the barbarian use the free action at the beginning of the next initiative order or any other time before his turns comes around again?