Following up on the hilarious news that George Lucas “fixed” Return of the Jedi by ADDING a Darth Vader “NOOOO!” (instead of removing one from Revenge of the Sith), here’s a Darth Vader-influenced D&D rule:
When someone announces an action that is sure to lead to disastrous consequences (whether it be a party member with poor judgment or the villain) (but it will probably be a party member), any PC may try to make an immediate interrupt action. The interruptor must make a special initiative roll, which must be below the interruptee’s current initiative. If successful, the PC may take a single action: a charge, a grab, or a basic attack. On a hit, no damage is inflicted, but the interruptee loses his or her turn.
1) The interruptor spends an action point [or, in pre-4e, loses the next turn], whether or not the initiative roll is successful, and
2) the interruptor must either do an impression of or play a clip of Darth Vader shouting “NOOOO!” on a phone, ipod, or other device.