This may just be a random cluster, but I'm beginning to wonder if there was a "Golden Age" of movie inflation in the late 1960s and early 1970s, by which I don't mean quality but just a lot of inflation scenes. Three popular films at least featured inflation scenes during this period:
1. Carry On Again Doctor (1969): Nobody ever seems to mention this one.
2. Willy Wonka (1971): Obviously.
3. Live And Let Die (1973): Which was rubbish.
4. Sleeper (1973).
If it's not my imagination, I'm wondering if it's something to do with technological advances in film making or prop making, or maybe something cultural (LSD?).
Incidentally there's another one with a wet suit and a goldfish which I can't track down but dates from the same period.
Just wondering.
Wow. Checked out "Carry on Again Doctor", and that scene and the context is pretty awesome, with all the machines going crazy and causing havoc to patients and people around. What will dissapoint many is that the person that gets inflated is an old man, but I think it is still worth checking out, at least for inspiration.
For anybody that finds the movie, the chaos starts at minute 17:51. You'll still have to wait a little, but I think seeing what happens before enhances it.