"When landing on water", they said,
(and presumably not being dead)
"Remove your jacket
from its packet
and place it over your head."
The last three lines are, word for word, part of the script for Ryanair's safety demonstrations, which sound like part of a Limerick every time I hear them (>50 times in the last four years), even though the scansion is, admittedly, a bit stretched.

[Moom] Ha! Oh the irony. An Irish airline oft-ridiculed for the way it handles matters making safety instructions in poor limerick form!

(KS) You'd like this, then:

∫ dcabin/cabin = log cabin.

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[penelope] Heard it again today on the way back to GC from England, and have to make a small correction: it's "Remove the jacket". Doesn't help the scansion though.

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Stevie -
To a boring volcano experiment
I added magnesium for merriment
And by sad mistake
Thermite I did make
And suffered a temp'ry impediment

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[Stevie] Yikes.

[Stevie] An admirable approach to empirical research. Top marks!

Another from a friend...
This young man at graduate school
Did find a red ring ‘round his tool
He went to a clinic
The doctor was cynic:
”Can´t you see it´s just lipstick your fool!”

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The proper version...
There was a young girl from Aberystwyth
Who took grain to the mill to get grist with
But the miller's son Jack
Lay her flat on her back
And united the organs they pissed with.
The first "y" in Aberystwyth is actually a schwa. Too bad