I feel a certain amount of disquiet in trumpeting this particular case too loudly. For one thing, a sample of one with no control tells us nothing about the potential consequences of vastly exceeding the recommended dose frequency, beyond the obvious of being able to discount the kind of toxicity we see with, say, rattlesnake venom.
More than that, I see that the man in question was 62 and that doctors had access to frozen blood samples taken over the last few years, which rather suggests that he's being treated for something. Putting it bluntly, there's a distinct possibility that he might well develop some medical condition, even die, over the course of the next 5, 10, 20 (who knows, maybe even 30) years. Whichever it is, you can guarantee that there'll be someone who will seize on that and attribute it to his vaccination status, accompanied by nudges and winks, and that their audience will lap it up.
That assumes that his future status is made public, and medical confidentiality makes it likely that it won't be, except for in an anonymised fashion. And that opens the door to another set of conspiracy theories in which he has really died, or developed this, that or the other condition... but "of course 'they' wouldn't admit that".