Likes To Blow A Lot Of Hot Air

(My Chemistry teacher has been known to go on ridiculous tangents from time to time. We are discussing mixtures.)

Student: “Is air a homogeneous or heterogeneous mixture?”

(Our teacher exhales slowly, a sure sign that a tangent is presenting itself.)

Teacher: “Wouldn’t it suck if air wasn’t a homogeneous mixture? You’d be walking down the street one day, and you’d hit a pocket of air that didn’t have any oxygen in it. And then you’d suffocate! But then you’d stumble forward and hit a pocket of air that was full of oxygen—”

Me: “Here it goes…”

Teacher: “And then you’d BLOW UP!”