They're vaguely similar, but this seems like a bit of a stretch.
Vaguely similar? They are identical in concept (lists of shit stuff followed by GET IN GRAVE or the far worse GET IN THE SEA), and the latter followed too soon after Boston Crab’s version for it to be a coincidence.
If the guy was coming up with anything else of worth one might argue that he’s a well-spring of decent ideas and good humour but he isn’t; it’s just this one thing which happens to be identical to Boston Crab’s own version with a word changed into two words - fucking the rhythm of the original, by the way.
I wouldn’t mind, but off the back of it he has a GET IN THE SEA book and he is somehow working with Bob Mortimer and trying to pull him down to his level.