This is a true story.
I went to the libary & my son found a book on making boomerangs &we came home &made quite a few so when my wife went to manly she saw a boomerang for sale &bought it it was made in china &made out of custom wood &had an aboriginal design on it & I think it cost $2 so when she came home &gave it to my son he went out street &threw it .
It went straight though the neighbors window cost $146 to replace glass .
He was about 4yrs old then &he was dad but it didnt come back .
I said well they only come back when there made in Australia mate .
He thought he was going to be in trouble but I just laughed.
Its not like it was his fault.
So maybe you got a Chinese boomerang.