I heard a different version about 25-30 years ago.
Three people sentences to death are allowed to choose the execution method for themselves (individually).
The first one chooses the guillotine, it gets stuck, they let him go.
As he walks towards freedom, he passes the other two and manages to whisper -- "the guillotine is broken"
With the second one, the guillotine gets stuck again, they let him go too.
Now it's the third one's turn.
And he says "well, if the guillotine is broken, letsssee, something else then".