ZMMMEMMMMMMM MMMMMMMEMMMRMMMHN          H               HMMMMMMMMMMT TMMMMMMMMMMMMM H           M               H           N               H           N               H           N               H           N               H           N               H                            MMMH                       H   H                       H   H                       H   H                       H   H                       H   H                       XXXXXXXXXXXXXXXXXXXXXXXXXXXX                                                                                    
Delayed Drop
The enemy on the left falls before you can get past the one on the right.

So stay up there with him, repeatedly digging one hole and trapping him, until the second enemy gets back up the ladders and well clear of the concrete.
