[Wait, but why would they have stopped talking about spellcasting and broom riding? Klaus even re-emphasized it at the end there. People really ought to just say what they mean and avoid doubling their conversations.]

Oh, yes -- I've not been able to formally pull out of flying lessons, so I've made an agreement with Professor Stark about submitting a redesigned broom instead of participating in the final examinations. You know how those sporty types are, always caring more about going faster than understanding how the things work. Jemma's been helping me charm the prototype properly.

[He's fairly certain that Klaus already knows this, but perhaps he's just forgotten.]