Fun fact with this, you don't need the train to make the INF (Not actually INF, just displayed as such) like this. Literally, just dummy, pact, infinite health and damage, pact to the dummy, grab the Phish button and use it. Dummy will give same result as your first step to make them glitched. After that, try the train again. But, the trick you did at the beginning, the reason why I said they don't have INF health is because you killed them, the game deems them dead. But, they aren't dead, so they instead have NAN (Not A Number) health, making them immortal to any attack that deals actual damage (crowbar, Lilynette, dragon deagle, portable, all of that, though death note will work) so that's why the glitch with the train works. Fun fact! If you do this glitch on boss rounds, let's say you just infinite damage and health, then use the phish button, bosses, and even some lobbies you can die in, (Mario, sweeper, I think it's called that) will deem you dead and you won't be affected by anything, bosses will ignore you, and even lobbies will ignore you.