For those who have been following the 'bride' thread - notice on the video in this link that the only time he has a change in attitude (roll in particular) is when he is half in the cloud towards the end and has conflicting information presented by his display and the ground.
It is that 'semi-IMC' that can be so disorientating as you go in and out of cloud at low level and result in the IIMC nightmare.