Just a Workout Session?

So I was working out at my gym this afternoon, and let's just say that the new guy on the treadmill beside me got into a rather...vigorous cardio routine. If you catch my drift. Before long, I found myself secretly timing his intervals with my watch and trying to guess if he’d break for a breather before hitting another set. Or would it be a set of something else entirely? Anyway, I know I should probably just focus on myself, but part of me can't help wondering if anyone else is as amused, or maybe intrigued, as I am by this unintentional performance art. Am I the only weirdo thinking about this, or does anyone else here get distracted by sweaty strangers too?