Grabbed & Attacks of Opportunity

[orphias]

Say a Giant Snake grabs a Fighter in its coils. If the snake moves away with the fighter grabbed in its coils does it provoke an attack of opportunity ?

[Cordell Kintner]

The grab ends when the creature moves, at that point the fighter is no longer restrained and can make an attack of opportunity as normal.

[HammerJack]

If the snake in question is able to move while carrying the fighter, the trigger condition for attack of opportunity would still be satisfied, since the snake is using a move action.

Trigger
A creature within your reach uses a manipulate action or a move action, makes a ranged attack, or leaves a square during a move action it’s using.