I just didn't know what to do, because I don't trust my buddy to be riding MY BIKE "recklessly." If he was riding his own bike then I wouldn't care, but I'm letting him learn on my bike.
If you have any other pointers, keep them coming. I've thought about getting the 70-200 f/4 non IS so I can be a little more comfortable when he was to come around. Right now, I'm just going to see what my 85 1.8 can do for me.
Keep the comments coming, because it will only make me better. I'll tell him not to wear a tshirt next time, because the shade obviously turned the white areas a little more blue.