Airlines in a Crisis

 What on the overwing exits stop them physically from being opened by a passenger with poor survival instincts during flight and did Boeing design engineers remove this safety mechanism from instructions for when installing a plug instead of a door. What other safety features did they omit on the grounds of cost saving in the design for using a door plug instead of a real emergency exit.  Normal cabin doors can't be opened during flight by design since they swing forward into the wind. There are few comments around on how this door (when installed) pivots. Is it up like the overwing exits or is it down since with such a small door there are probably no self inflating slide like the normal cabin doors. Or is it left or right. On the 737-200 the emergency exit overwing door came out loose and into the cabin. On the 737-NG-800 they swing up and out of the way. I doubt it just is pushed out and fall down because that could damage it during testing / maintenance. Would the overwing exit