The bodyguard was actually greatly relieved when he found Amos in a scuffle with two girls. When he had first realized that the boy was missing from where he was supposed to be, his first thought had been that there was some major plot to either kidnap or outright kill him.
If the ones responsible for carrying out such an incident were 'pros', then the bodyguard knew that it might already be too late by the time he managed to find the boy.
He had already been prepared to make the call to his boss if he didn't immediately find Amos within the building.
But in this situation, clearly, his own young master was just seeking trouble, and there was no actual 'incident' to worry about at all.
If something had actually gone wrong, not to mention his job, perhaps even his neck would have been on the line. So it was understandable why the bodyguard felt great joy when he saw the hero 'just' getting beaten up by Jenna and Lara.
