I've just been talking to a friend who has read some of Flynn's recent book. He says Flynn is mad as box of Nadine Dorries and clearly struggling to produce rational thought.
Which I have to say ties in with the bizarreness of Flynn making those phone calls to the Russian ambassador in the first place, when he must have known they'd be recorded.
So while that analysis of Flynn's request for immunity is very interesting, an alternative explanation might just be that Flynn is bonkers.
I know, it's a problem with all of this administration. A lot of the time there's simply no point in working as if something deep or clever is going on: it ain't.