I know! Even if my family looked at me weirdly for... well, they still do sometimes. But I'm thankful that I had the mask anyway!
I always say be prepared! You did a good job, there, even if you didn't know you were doing a good job up until the moment your sister and the bear gas had their disagreement.
I personally sleep with a screw-driver under my pillow, in case of home invasion. My plan is, though somewhat childish and unrealistic, to stab at whoever I might find standing over my bed in the middle of the night. I have only needed it once. On the plus side, the friend who sneaked in to see me didn't need any stitches.