The feigned injury was nothing more than a ruse to get him off the pitch
I agree. But he did feign an injury and he was therefore doing the opposite of trying to convince the referee that he was not hurt.
All he had to do was to show that he was bleeding, not that he had suffered an injury like a broken bone, a twisted ankle, he just had to show blood and, thanks to the H & S rules, he had to leave the field and be substituted.
He did not roll around on the floor in simulated agony.
However I don't think that this is the kind of feigned injury that happens in virtually every game of Soccer, in the so-called Top Flighyt, anyway.
AS you say "a flippant comment from another flippant comment" - the incident has not, as far as I am aware ever been repeated.
The most interesting thing that I have seen in soccer this season is Jose trying to explain why Chelsea have been shit so far!