I didn't realize you can only gift extra nutcrackers to your partner. They need to change that and allow us to gift them to anyone. Maybe after they are removed from the partner gift section. Please @PIMD?
I've also gotten an avatar from a bomb. Needless to say the chances of you getting something rare comes more when you drop the bomb yourself because you get something useless and usually something good. I've seen cats and bikinis drop, and even sometimes multiple in one bomb. It's all the luck of the draw.