We can speak french as you are from Québec
but for other I'll write with my bad english
I've found this picture in a site dédicaced to the spitfire,the comic is from J.Barbaud with draw those strange looking plane in a monthly magazine dedicaced to air fan : "Le Fana de l'aviation"
2 others :
legend : "with a Spitfire coded LO-W I'm forced to fly low
"
Sorry for you non french speaker the legend is almost non-translatable
I've tried in another bbs and it has proved that this kind of jokes are not-understand