Human! You are about to become a sword robot! · By Doborog Games
Mine is when you pick jetpack on Death Cube, and just slice them all in one go (horizontal slice)
When you kill multiple robots with the hammer's sideswing, there's something that's so satisfying seeing all the bits and pieces flying around.
Watching a robot slowly burn with fire... their bodies, slowly disintegrating into nothingness, and their voxels becoming little burnt pieces of ash.