I have an odd Dragon Age related question, but not Cullen related. I just don't know a better group to ask, to be honest. I have a scenario-If two people are at the "in each other's face" portion of an argument-You know, right before someone swings (*grin*). Say one of them is a mage, the other a fighter.
Is it possible for the fighter to 1) know that the mage is gathering mana, and 2) Interrupt by jerking the mage's hand down to their side? Would it work if the warrior broke the mage's wrist?
I'm not an expert on mage lore by any stretch, but I'm going to guess I'm one of the people in the thread who has done more physical interventions than most? That being the case...
People almost always have at least one "tell" when they're becoming escalated. As that is happening, they are gathering energy - whether they're planning to use that energy to throw a punch or cast a spell, it would be the same principle. It's not so much that you would see something magical, as that you would see there's some sort of attack coming because people are rarely calm enough in an altercation to avoid giving any signs of escalation.
You absolutely can interrupt, but I would not recommend bringing one hand down to the person's side because they are probably just going to use their other hand, and by their side is not a secure position for the hand you're holding because there's too much freedom of movement. I would probably put the person in a basket hold at that point, but what happens next really depends on the context (i.e. are there weapons involved, are you trying not to injure the person, etc.)