Did you know, that ... (Part 55)

.. that after you played Tangle Atropos' Hand to cancel an action (after another minion attempted to block), that same vampire can attempt the exact same action again, even if it's a bleed or political action. The reason for this is that the action was never resolved, that is the action was neither successful nor was it blocked successfully. Notice the difference to Change of Target or Psychomachia, where the action is canceled, but only after a successful block.

Reference: VtES Usenet Newsgroup.