Yeah - was fascinating turning around during a 'mutual' spinning session taking turns to watch the tail waggle back and forth
Then the spin going flat after about 3 turns
Then the nose going vertical and spinning faster for a couple of turns before stopping when you put in opposite rudder and forward stick. On one of the 'mutual' spins my fellow instructor candidate 'just forgot' to unload when he stomped on the opposite rudder - now THAT was interesting