Today my classes read and discussed Science World magazine. One of the articles was about William Trubridge, who set a world record for diving to a depth of over 300 feet on one breath.
We'll forgive the young lass who inquired as to whether Mr. Trubridge took his breath before he dove under, or at the bottom of the 300-foot dive. Because even though most people understand that you must take a breath, which is air, before you go underwater, as it is hard to survive a lungful of the liquid dihydrogen monoxide, the article did not specify precisely where Mr. Trubridge inhaled. So it was an honest question, not meant to sidetrack those of us wise in the ways of water and the respiratory system.
Talk turned to the nature of the record-setting dive. How Mr. Trubridge had to get back to the surface to inhale, so he had to budget his time carefully, or be faced with a frantic rush from the hydrosphere back to the atmosphere. Lass Two announced authoritatively,
"Yeah. He has to be careful, because if divers come up too fast, they get the runs."
Let the record show that several classmates enlightened her on the difference between the runs and the bends.