Dead Cells

After beating The Nest, I travelled to The Fractured Shrines. I unlocked this by waiting for an enemy to be in position on a platform below me and dropping down to press t he gold switch and t he log swing trap hit us both and knocked them off into open air and they fell.

I tried causing an enemy fall through a disintegrating floor and knocking an enemy into a shuriken trap, but neither of these actions popped my achievement for me.

I am sure you do not need to get hit yourself after triggering said trap, this is just what happened to me.

Good luck!