Here's the text for page 18.
I'm a doctor.
It was right after they both ate that handmade cake that had been in provisions from the first half of the year!!
It was probably food poisoning.
If the pilot and co-pilot are both out, does that mean this plane will crash!?
I like this one - "kopai", meaning "co-pilot".
How many fingers do you see?
In Japanese, the counter for "long, thin objects", like fingers, beer bottles or tentacles, is "pon". The joke works better in Japanese, since he's really asking "How many tentacles do you see?".
"Tsuraku" is a repeat of the word just used by the attendant when she asked if the plane would crash, used here to show that Kurin is obsessing over it. The "pa-n" effect is for the tray crashing to the floor.
Flight 4649, do you copy? This is Tokyo Tower.
Ah, Chief Sakamoto.