Disclaimer: Not mine, except the implication. And Willie actually does do something that makes Danny say "Don't do that!" but I didn't get a chance to see what it was, so I made it up.

Desperation

In the shadows between the huts, Willie starts to believe that Danny really will go wire-happy. It makes him desperate - desperate enough to push him to the ground and try to hold him there until he calms, desperate enough to let Danny throw him against the hut wall in anger and still attempt a placating half-caress along his hip that is rejected with a snarled, "Don't do that."

Desperate enough to lower his voice in a whisper, putting all that fear into the words, into the repetition of Danny's name, hoping Danny will wait for the tunnels – and him.