"Rotate your muscle around the bone."
By nature, our wrists are particularly prone to injury. Learn how to protect them in your practice.
Patanjali never said anything about anatomy or alignment, though. So why bother? I actually have two very specific reasons for teaching alignment and anatomy; one is practical and one is embedded within the philosophy of the Yoga Sutra.
When it's getting close to the end of class and it is time to stretch, please do not decide that in lieu of stretching you'd like to do arm balances that cause you to flop all over and fall on your neighbors who are in pigeon pose.