A Royal Navy instructional film from 1972, my film collector friend picked this one from a dealer. He showed it at his home and now we all chant the film's title whenever someone falls in the water. Three reasons why it's riffable: The high frequency jumpscare of the title card warning COLD CAN KILL, the goofy Hanna Barbera-esque animation illustrating how alcohol will kill you if you have hypothermia, and the mention that the water "impregnates" your clothes.

Full film:
https://youtu.be/FoaGhUuMXeE

YouTube still frame:
https://i.ytimg.com/vi/FoaGhUuMXeE/maxresdefault.jpg

Metadata from Imperial War Museums:
https://film.iwmcollections.org.uk/record/35572

ACMI collection:
https://www.acmi.net.au/works/66218--cold-can-kill/