Rescue Diver is my favorite course to teach! It's a great way to safely stress test a diver's abilities to respond calmly to scenarios requiring self-rescue and assists. As an instructor, it's a great way to get paid to screw with your students (I can flood a student's mask, rip their reg out, and pop their weight belt in split-seconds).
Have fun and safety first!
RE: Letting It All Hang Out While Tec Diving