I used to sail shortboards a lot until a pinched nerve problem made me stop. When a strong puff hits you and you feather the sail, the torque that you experience gives you a first hand feeling for what pitching moment is.
Another windsurfing problem is something called "spinout", the first time it happened to me, I could have sworn that the rear fin just broke off, the letting go was that sudden and extreme. My thinking is that it is due to "cavitation", it's more correctly called aeration but everyone calls it cavitation. What happens is that the suction on the "top" of the fin starts sucking air spanwise down the fin and that destroys the vacuum there and the sudden increase in angle of attack due to the loss of lift just cinches the stall, just like a snap roll.