This might be clearer. Or not.

     He could kill me, too. A leap. A snarl.

It seems to me that something other than the following line might be more useful. I don't like its interruption of the intensity of the imagined struggle with a seemingly extraneous detail.

     him with two extra flexed legs,

Thanks for all the input. I apologize for taking so long to respond. I've been sick. I copy the comments and use them when I rewrite when the poem still needs more work.

Thanks again

I like the conceit John but I am troubled by the scansion.