Boomerangs

While boomerangs are classic toys,
They’ve also served as bird decoys,
At times percussive instruments
And fire starters (minus flints?).
As weapons, whether used to hunt
Or fight in war, they’re always blunt.
Forget the kind you’ve likely seen
In comic books or on the screen.
For boomerangs to change direction,
Throwing angles need perfection.
Battle types do not return,
For reasons people ought to learn.
For instance, any two-way flight
Requires wood that’s much too light
To strike that hard, and once it hits,
A boomerang will call it quits.
On further thought, that’s just as well:
I’d think that if your foes can’t tell
A way to dodge or block your throw,
You too might take an awful blow.
Sure, fiction writers like to add
Variety, but don’t be had.
If you don’t get the physics right, you
Find your plans come back to bite you.