[He stares at Niko for a moment, concern showing even through the anger on his face. Then he suddenly draws his machete, and strides past Niko to grab Belloq by the collar, the edge of the blade pressing at his throat. His voice is low and threatening, and it's obvious he means every word.]

You're gonna stay away from him. Don't give a damn where you go or what you do, but you're not gonna bother him ever again. You do, I'll make you regret it.

[He shoves him back hard, then goes back to Niko.]

Come on. Let's get outta here.