and it had a half key in it? is this normal

yes, just rare. happened to me once :wink:

I've had this happen twice in about 500 strange boxes.

From our Random Events Guide:

 

 

 

 

 

 

 

Strange Boxes

 

 

 

 

 

 

 

Also given by the MOM. If you're paying attention, you might even notice him saying "Here, take this!". Click on the box and answer a simple question regarding the colours and shapes on the box. If you get the question right, you'll receive some gp, a gem or maybe even a half key!