So my wife sometimes says "It's nice, let's take the plane up for a spin" to which I reply "let's take it up for a ride". She finally asked why I say that and I went looking for a spin video and found this one. The King Air is being flown just above stall speed with the power way back on the left engine and up on the right to hold altitude - a common operation but it takes lots of rudder to counteract the yaw. Well, when the 6th guy gets out it not only moves the CG too far aft it blocks the airflow over the tail, so you can see the plane pitch up and stall. With all the yaw it snaps into a spin. It looks like a couple of secondary stalls and spin entries on the recovery, possibly attempting to pull out too fast after stopping the spin. In the spin the plane is stalled and not building speed but once you break the stall/stop the rotation it's very nose low and builds speed rapidly.
Anyway, after seeing the video she says let's go for a ride😁