He hears, but he only slowly emerges from the sand. Just enough to see who his trap caught. And when he does, his eyes harden.

This guy. How oddly ironic. He doesn't want to admit it, but deep down? Don was glad it was this guy who got snagged in the trap. He wouldn't hurt anyone else this round.

Quietly, Don stands up fully, letting the sand fall off of him. He doesn't say anything, he doesn't mock Tate or swagger with victory. For one, he refused to be so petty (though he was certainly tempted to give him a punch to the face, remembering how he treated his victims). For second, there was no point in it - as his master always counseled, a warrior who gloried in bloodshed he caused was less a warrior and more a murderer.

For third, he only had a couple of seconds to take the useful parts of Tate's supplies after he expired.