Bruce was ready. The dagger slid out his sleeve, into his hand, and he sliced upwards, cutting the vines, he leaped over his desk, agile and fast, clearly having kept up with his training and his skill. 

Now. 

How to stop the boy without hurting him. "Why would I hurt Pamela? She's given me no reason too. And besides that, I care for her." Aware of what Nicholas could be capable of, and knowing so, Bruce was wary, watching Nicholas, the dagger gone once more as if it were never there.

How to stop him? 

"You have a choice here, Nicholas. Become your father by attacking me, or become a better man. The man your mother would hope for"