>>616
ちなみにブーメラン、基本的に返って来ないよ。

Traditionally, most boomerangs used by Aboriginal groups in Australia were non-returning.
These weapons, sometimes called "throwsticks" or "kylies", were used for hunting a variety of prey, from kangaroos to parrots;
at a range of about 100 metres (330 ft), a 2-kg (4.4 lb) non-returning boomerang could inflict mortal injury to a large animal.

https://en.m.wikipedia.org/wiki/Boomerang

カンガルー≒分からないの寓話同様、
現実には馬鹿馬鹿しい例えではあるが
…わざわざアボリジニまで出して来ますかw