I think there was an honest to goodness report where Leonardo DiCaprio (who apparently is actually a vaper that uses cigalikes) was filming a love scene on the set of a movie when he lost his.
From what I remember reading, he had his vape stashed under the pillow when the scene started and at the end of it, he went to retrieve it and it was MIA.
Apparently the female actor found it nestled between her "Butt Cheeks".
But (no pun intended this once) to get an E-Cig, much less a full blown mod stuck up there, it was an intentional act on someone's part.
For what reason, I will not speculate.