His heart attack was initiated by an air bubble injected when he was connected to an oxygen machine at the club's physician offices.
This allows them to maintain an air bubble during high tide.
He reasons that an air bubble, that got accidentally injected into the patient's bloodstream through the gums, would explain all the symptoms.
Many water beetles carry an air bubble underneath their abdomens, which both provides an air supply, and prevents water from getting into the spiracles.
Care should also be taken to fill all tubes completely with alcohol before they are despatched, so as to leave as small an air bubble as possible.
The irregular shape just below centre is a thin air bubble under the top film.
The loop could then correspond to a compressed toroidal air bubble injected into the fluid.
The apex of the epiglottis can still be seen (behind an air bubble).
