Jealous Eyes reads "When this card is played, immediately end and resolve the current action chain. Action: Move up to 2 resource tokens from target opponent's card to a card you control."
My question is, is the action part of Jealous Eyes considered to be part of the 'current action chain' or does it constitute the start of a new action chain? For example, I play it targeting my opponent's Slave Pen. Can he respond to my action by playing Burn It Down, thus denying me the two resource tokens?