as yoko points out you should not hand over control to another pilot if the craft is in an unstable state
neither do you had over to the AP with the craft unstable
where then are the standards set for what aircraft state or failing that ! the DISPLAY state that needs to be set for the AP to hand control back to pilots
how would you feel if your co pilot handed you an upset craft and then started shouting in your ear and thumping the yoke!