Hello Fu Fu,
Hope you are enjoying this instructing lark.....
As a new instructor myself ;-) Yes, I have noted that my attention from time to time can become a little too pre-occupied on the student. I am sure it is all down to experience and having sufficient 'spare' capacity. We are learning as much as they are. Did the oil really look like water though??....have you been getting enough sleep man
Take care.......beer soon???
Mordacai