The best one I've ran into (so far). I was working on the emote macros for my 3 shaman team in Camp Taurajo and I had them standing side by side. This kid comes running up, watches my little party bow, flex and whatnot simultaneously, and says;

Knucklehead Kid: WOW!!
Me: heh
Knucklehead Kid: lol are you guys bros?
Me: Yeah
Knucklehead Kid: i figured. i bet getting the timing down is hard isn't it
Me: It can be. Later.

The "are you guys bros" still cracks me up.