Ironic that you say that.
Got all 17 certified today, but all four dives I did someone had some fucking issue.
I'm pissed, not at my kids though. They all did beautifully given the circumstances. I'm fucking pissed because the other instructor pulled some bullshit just to fuck with me that put students at risk, then had the nerve to tease me about the whole thing and how he didn't help, just sat there and watched. He basically passed off four students so positively buoyant that it took everything I had to give all four a slow ascent to avoid decompressions sickeness or lung overexpansion injuries.
Then on the boat he makes a joke about how hard I was breathing and I was like, "of-fucking-course I was breathing hard, I was swimming with all my strength to keep those kids from bobbing to the surface like corks!" He trid to tell me I should have pulled their purge valves, but I told him letting go of one meant losing one to the surface. There was no way to focus on one without losing another. And the whole fucking time he was just watching.
He thought he'd task load me with my one sort-of diving fear - being underweighted - by twisting it around and playing on how much I care about those kids. It was a completely unrealistic situation, with zero benefit to anyone. I'm so glad they had fun in spite of that shit and didn't know any better.
Aside from that I had a student's tank fall out which we handled fine, and another have mask flooding panic, which again, handled fine.