Double-down Muck (the classic 'chop')

MUCKS, BREAK-OFFS, COOLERS & MORE - chapter 7, page 509

For those of you who enjoy this genre of moves, this is probably the first muck that you should learn. It's the best one-for-one switch I know and it lays the foundation for many other mucks. Note how the dirty hand moves to behind the rail for protection; this is a common ploy with most muckers.