Humour in Boron&Boulpaep

So I was reading Boron&Boulpaep (Medical Physiology) about the ventilation and pefusion of the lungs, when I stumbled upon what appears to be a joke.
p691:

Now, what would happen if the excitement of reading about respiratory physiology caused your alveolar ventilation to double, to 8400 ml/min?

Haha. Nice one, B.

Ok maybe it's not funny, but it made me laugh. ._.