victorzamora
Contributor
"Have you ever seen the TV show Wife Swap? Because I'm going diving with that guy over there now"
But seriously... If it were me, I would start with asking how they thought the dive went and try to get somewhere constructive from there (i.e. their acknowledgement that they did some dumb stuff, and what could be done to improve that). But in your place I would probably just move on
I just finished Full Cave, and in all four classes and 16 dives (Cavern, Intro, Apprentice, Full)....the insturctor asked us that very question. Every debrief started with: So, how do you think the dive went? If we didn't point out a mistake we made, why it was a mistake, and how to correct it, he would do so for us. After the first one, though, we found most of the flaws ourselves. If you end a dive and get asked that question, it makes you think. If you get asked it a lot, it makes you think automatically after EVERY dive. That's what that practice got me doing. Normally, asking someone how they thought the dive went makes them question. Also, it doesn't hurt to kinda make-up a flaw you made. "Oh, I had a lot of trouble clearing my mask" or "I'm proud of my air consumption because I have plenty, but I used to be a bit of an air hog!" It makes it seem like you're not scolding him, but that it's part of your debrief after every dive. I think it's something you should do after every dive no matter what. Your buddy may have caught mistakes you made!
One thing you may want to do is have a private conversation with a very good diver (bigger/stronger guy wouldn't hurt), explain the situation, and see if he could dive with him or with both of you. Then, if something goes wrong you have someone bigger AND better than you to help you out....AND you still get to learn from the better diver. A DMC or DM wouldn't hurt to have with you. Normally DMs/DMCs are where they are because they want to help teach/coach/mentor people, and they may gain invaluable experience from it. I was often that guy (big guy, DMC....not that I'm a good diver