Will stiffened in surprise as Mr. Lang spoke to him. His gaze flitted to the floor and he blushed when Mr. Lang jokingly requested that he not pee on the floor. The older man was rather perceptive, but given that he was the second person to point out that he'd noticed, maybe Will was just being too damn obvious. He strained to stop fidgeting, biting his fingernails anxiously in a last-ditch attempt to take his mind off of things. 

Lang's female assistant gave a piece of news he had dreaded hearing. This was his first class. There was no way he'd be getting excused anytime soon. Internally panicking, Will dropped to the back of the group as they filed out towards the obstacle course. Now he had even more reasons to be drowning in anxiety. Partner activities were the worst. Having someone else rely on you when you were the least competent person in the whole room was a sickening thought. 

He continued to say nothing, glancing up at his partner with an apologetic sort of look. If Mark got mad at him for being a bad partner, he decided he wouldn't retaliate. 

Then again, Will wasn't really giving himself enough credit. He didn't really know what these people could do, he only assumed it was better than what he could do. In actuality, his ability was far from pathetic and he had remarkably good control over it for someone who'd only had it for less than a year. But in his mind, he imagined that because he was a beginner in an advanced course, he'd just end up making a fool of himself and making Mr. Lang regret ever giving him a chance.