Relax. What's the harm in saying hi? While walking through the parking lot this morning, I saw a friend in her Toyota Corolla, and waved.
If you know me, you know I love keeping things light & upbeat. [Warning: incredibly sarcastic statement ahead] Paul was shocked when I asked to be the director.
If you have a teacher who feels they know everything and aren't still working on their abilities/skills/approach, I'd encourage you to study elsewhere.