WOW, this scary malfunction will get your palms sweating! It starts off with a tension knot on the main canopy, which turns into a spinning malfunction. He tries to cutaway, but the cutaway cable was stuck, so he deployed his reserve because he was losing altitude quickly. The reserve opened with line twists, and both canopies went into a downplane. Luckily he was able to cutaway the main once he was under his reserve, cleared the reserve line twists by 500-ish feet and landed safely. Phew!
After inspecting the gear, they're still not sure what caused the cutaway cable to get stuck — maybe the cable housing was really dirty and lodged the cable from coming out?