Getting thrown across the room and into a wall was rather painful. Tony would not recommend it to anyone. Before he could even think about trying to recover, her hand was on his throat, forcing him to pay attention. He stayed on the ground, unmoving as Katherine made her threats and promises. This was far more dangerous than he and others going up against their usual psycho terrorists, like Ari.
"Why not? You'll just kill me when I've run out of use. Or I don't know. Turn me into a vampire for your bloodsucking male harem you might start akin to what Dracula had in the movies." But he made no move to free himself or grab her. But if he could get his phone, maybe he could send out a sort of coded message to Ziva or someone. Hoping that his eye lock with her would keep her distracted, he slowly inched his closest arm to her forward, knowing where his phone was. Now if he could just get to it.
[ooc: I figure Katherine would obviously know he's moving. Vampire and all. But Tony has to try :D]