If you are saying this incident never happened, or that Mizuno lied, you should say that. That would not be batty, but what you did say will make people think you have a screw loose
Seems to me the fair thing to say is that this is a) an anecdote b) inadequately imaged, measured and documented even if true c) never replicated though it cries in anguish for replication d) highly improbable
... and therefore, not credible. There is no evidence for or against Mizuno being dishonest (unlike, for example, Rossi). He could have been mistaken, someone could have been playing a practical joke, Mizuno might have confounded various real occurrences, gotten confused by a dream... WHO THE HELL KNOWS since he can't do it again nor anything remotely like it?