As the class went out, Lily aw Kris get up, and just about trip over Angelo's legs, before having a hissy fit, and kicking him. Annoyed at that, and at his behaviour in general, Lily said "Maybe you should watch where you are going, or maybe you shouldn't deliberately try to trip over just to abuse someone! AND technically, your legs do determine personal space as they are attached to you, and as far as I know, no one can detach them! So why don't you just stop being a jerk" She didn't like what was going on here, it was  like Kristopher had gone out of his way to trip over Angelo, just for a confrontation.