Salut,
First as greeniguana replied, why would this diver do a 2nd dive.
Second, here's a story that might make you chuckle. 2 years ago this week, I was diving at Canteen Park in Brockville. I was with 2 buddies who were experienced tech divers. They were teaching me how to use an electric scooter. Had a blast but as we were returning from a 45 minute dive in the St Lawrence I noticed a diver panicking about 100 feet offshore. So I rushed over, did a quick assessment, asked if he needed help, dropped my scooter into the water and offered my octo. As it turned out, he was in the Rescue Dive class and it was there last exercise and he was the dummy. Eventually we all landed, had a good laugh and these RD students all said that the class was much better than OW and AOW. I've talked to other RD divers and they all said that the course is great. I did my AOW last year and have RD on my bucket list in the near future. Dive, dive, dive, safely and wear a mask.