Hah, well that'd be one way to short everything out one last time! And interestingly, it looks like BB-8's head is attached on a pole of some kind to the body. Maybe that's just a feature of being in the droid-seat of the X-wing? I would have thought the head would still just be magnetically attached. Or perhaps it just looks like the head part was launched at the same fuse panel? If it's a different part that's breaking, that could make more sense.

I'm not sure how this would have been taken in the movie, but I think here it's a good bit of minor levity. Assuming BB-8's perfectly fine and that there's not an immediate reason to be sad or disappointed anyway. Sure, it's a little silly of a resolution, but it's obviously a key part of the movie so far, so having a brief moment of success before the inevitable downward twist would be good. I think this movie came out around the same time as the MCU started really increasing the amount of bathos used in that series, so it'd make sense from that side of things as well.