According to Arwel he laughed so much because the troops seen in the background - they were training. And well everyone knows that they are not allowed to move in a way that they aren’t supposed to.
So they all walked past, and you could watch how one after another did a double take and had a hard time not turning their heads to look when they realised who was standing there. So they just kept staring as long as they could out of the corner of their eyes…
haahahah I’m laughing too!!! …so much!!!! XD
A tear in time and space.