I'm no expert either, but what I believe he said was:
"Berlin, turn left ON alpha, when you're exiting and I'M pushing the STUFF like that, you can not stop with your tail over the runway."
This was a hectic audio clip and there was a lot going on during the moments of the Berlin landing, Turkish on final approach, and Mexicana almost being cleared to go. The controller was needing the help of all three planes to make his plan work. All three had to be working together or the controllers plan would not work. Unfortunately, one plane messed up and threw the controllers plan for the others out.