Try doing that to Ninja and he'll shred your arms, no matter how gentle he is! He would be sure that you were trying to drown him so it would be self defense!
there was a marry tyler moor show, that did something like this, also replacing the arch of text at the top with her own. there's probably a link to it somewhere. was a different cat, otherwise same. this was, i think, some time in the 60s or 70s