It kind of seems like the tatoo artist is hanging in mid-air on the cougar (or whatever ferocious cat that might be), but besides that, very fun indeed! It's like the kittie version of your "Really Exist" bunny.
Clever concept as always sir... the only thing I find a bit odd aside from what FA have mentioned is the legs of the cougar. Probably a couple of more lines would have helped to emphasize it's form.
Is this a simulated process print? If so I think you could take advantage of some color. Also I think you need to define his chin/jaw area a little from his arm, maybe add some of the darks from his shadow in those areas. Overall a good design.
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