For all the yards of discussion there is about pair lifts, throws, death spirals, I still maintain the most difficult pairs element to master is synchronized sbs spins. The only pair I've seen personally who were always perfectly in synch was Gordeeva and Grinkov, although I'm sure there have been and are others. But I've never mastered it myself, and everyone I've seen goes off at times, either a bit and then they get it back, or a lot and it turns into a mess. That tiny split second each revolution when you can see your partner isn't enough to get yourself lined up again, although it's usually the man's job to change his speed to match hers (otherwise if you both independently try to change speed to match the other you'll end up with a worse mess, and it's not as if you can have a conversation about it while you're spinning). Just as it's usually the man's job to call the revolutions and give the "Up!" or other change commands because his voice carries more clearly.Perfectly synchronized SBS spin (don't see the synchronicity that often, but if you do: fainting again)
Unless you're Irina Rodnina, of course, who was always the one in charge .