Omg, I totally get that at work. Most times I am up to no good, as in pranks or making people laugh. Heaven forbid I have a day where I am just (quiet). To them, there must be a reason, cuz it isn't normal for someone to be quiet for the hell of it. Idk how many times I have said, "I just don't feel like talking, but if you keep saying I look crabby, then guess what? I gonna be freakin' crabby. Glad I am not the only one :-)