Now the reasonableness of experimenting on yourself, even in a scientifically "valid" way, is certainly arguable. But the elements are all there; Theory of the Immune system, Hypothesis that it can be trained in this way, experiment that trains immune system in a known with with the experimental training element.
As others have pointed out, the immune system is designed to kill cells it doesn't like. And it has been demonstrated in other scenarios that it can target cells that are vital to one's survival, resulting in death when the immune system targets and kills those cells.
Thus the risk in the experiment is that it will successfully invoke an immune response, it just won't be the one that was anticipated.
Not surprisingly, this is the whole point of animal trials to get a feel for what might happen.