The trochaic inversion

[milo]

So this line works? it's L3 with Li and 2 straight iambs.

on SHAky GROUND but GREW SURE of himSELF

sounds funky to me

yes, but don't forget this part:

It is used to greatest effect at the beginning of a line, lesser in the middle and, dare I say, to no good effect at the end of a line.