He really can't blame other people for being leery around him. In fact, he was almost more worried if they weren't.
Bruce looks over at the unfinished serum gun with more than a little curiosity. It was obvious to him what it could be used for. "I take it it's a little more complicated than drawing it up in a vial. Has to be calibrated each time?"
He doesn't laugh with him, "I must have missed that one," absently talking as he moves to pick up the serum gun and inspect it on both sides.