Boomi on LOW BATTERIES/Furby Fake

So very odd😳 I tried this multiple times with different sets of batteries, and every time, he eventually ends up repeating "la" ..
This makes me wonder if it's not a glitch, but rather a way to signify low batteries, Since I've never heard him say that particular word otherwise.
Also, this la noise comes from the secondary speaker, so it might be one of his legitimate singing sounds I just haven't heard yet.
Maybe we'll figure out once someone finds a complete set of Boomi instructions!
This also means that the Boomi in the first uploaded vid was likely just on dying batteries .. mine are beyond dead, so poor thing struggles to move :(