I read an article in some mag or other where a guy reckoned he'd recovered a 152 from a spin just by opening the door.
Also, an Instructor of mine force landed back on at Rand (SA) after the door popped open just after take off. The same guy was killed last year in a freak accident along with another Instructor and a passenger when the C185 they were flying spun in shortly after take off. Last I heard it seems that the pilots seat may have sheared its attachment rivets which (allegedly) should have been bolts !!