RE: it was a bad day
Sorry to hear about the problems you had. Being an instructor can be very trying because you now have the responsibility for your students plane. Here are a couple of tips that may help you a little bit as you try to save the students plane. First, have an experienced pilot go up on the buddy box with you on the main radio. Have him put the plane into "out of control" situations up high, and you can practice releasing the trainer switch and recovering the plane. Second, when you have the student flying the plane I always move my sticks on the main radio as if I was flying it. If you do this then you will be instantly ready to take control of his plane when it needs to be saved.
Just like everything else in this hobby, being an instructor needs to be learned. There is a skill set that you need to learn in order to help your student. Hang in there, you'll get it. I'm glad that you stepped up to help teach this great hobby to somebody else, we definitely need more that are willing to do that.
Ken