You know, a few years ago in my mother birthday, my sister got upset at her because when she came over the cake was already done and she got upset at my mom in her birthday. Then she sat on my mother's favorite place in the table and suddenly a dry impact we heard. My sister was looking at her watch that was broken and she felt something on her leg... it was a bullet that went trought the ceiling! (my roof of my house is made of a very light material). A friend of ours found the bullet on the floor but it was close!
My sister was crying, my mother was holding her, you can imagine the scene. The bullet just scratch her leg a bit but after bouncing from the watch. No to mention how close she was from getting it herself.
In other words, do not mess with your mom on her birthday.