In Star Trek 09, why did Sulu use a fold out sword instead of his phaser against the Romulans when he and Kirk boarded the drill? Kirk had his phaser knocked out of his hand, but Sulu would still have his - why kill the Romulans with his sword, when he could stun them with his phaser? You could argue that the dampening field that was interferring with transporters and communications affected phasers as well, but tge Romulan energy guns seemed to work just fine...