No not odd. With a sudden decompression at altitude, there would be an awful drift off the ramp. The same happened to a Lockheed Galaxy carrying scores of Vietnamese orphans being evacuated during the Vietnam war before crashing. Paradrops are controlled conditions, not sudden decompressions. Remember the BAC-111 that lost its flight deck windscreen and went into Southampton? That was only at 17,000', yet it blew off the Flight Deck door and would have sucked the Captain out had he not been lapstrapped. As it was he ended up outside the aeroplane with his head getting battered on the fuselage above the window! Sudden pressurisation effects are immensely powerful, even at medium altitudes.