Unfortunate Encounter in the Jungle

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A man sits in the coils of giant green snake (supposed to be a boa constrictor), with its mouth open about to bite. The silly man is thinking about what he's going to sing as he goes down its gullet.
From the song I'm Being Swallowed by a Boa Constrictor.
Some of his ditty:
oh no he swallowed my toe,
oh gee he's up to my knee,
oh my he's up to my thigh,
oh fiddle he's up to my middle,
oh heck he's up to my neck,
oh dread he's up to my ...
Unfortunately, the way the image came out, I doubt he'll have time to sing; I'm afraid he's going head first!