Jimmy Macho went out on a limb
To impress all the girls in his gym.
But the limb was too thin
And to Jimmy's chagrin
He now flirts with divine seraphim.

My goldfish all died. It was grim.
You ask why? I'll go out on a limb
And say every fish sank
To the depths of the tank
'Cause their mom never taught them to swim.

Elmer Fudd chased that bunny so trim
Up a tree, where the branches got slim.
It was never his plan
When the caper began.
He admitted: “I'm out on a whim.”

Based on the suggestion: “Out on a limb”