This was stupid as an ad lib, but it's even crazier to think that he would go back to the Hannibal Lecter thing after so long. Someone had to have (or should have) pointed out to him that it made no sense. Aside from Hannibal Lecter being fictional (and as such, immune to death), even the actor that portrayed is still ali-why am I even entertaining this bullshit?
All I can say is that Trump own-goaled this one. All he had to do was come out, make a very short and focused speech about absolutely nothing concrete, and he would have gotten graded on the same curve he always is. Hell, he had a legitimate excuse with the stress of being shot at this weekend. No one would blame him at all.
Instead, he basically made a point of illustrating exactly what is bad about him. This is the guy that people are afraid to try and beat with an honest, directed campaign. Ignore the cult that you know you can't reach, drop all of this Biden bullshit, hammer this dude on the weakness of his positions and his party, and wait for him to do the next big thing to self-implode. Lather, rinse repeat.