I read in a magazine that an explosive decrompression is usually if not always fatal to all on board. This means that the air is expelled from your lungs faster than you can breathe out- effectively causing the lungs to collapse and damage to the chest area. Even with 02 explosive decompression would cause instantaneous incapacititaion. Rapid decompression on the other hand is nowhere near as severe and masks will help. In a Bizjet like a Lear 35 a decompression will most likely be explosive thus leaving the occupants with very little time to act(unlike an airliner which will depressurize much slower)