
Playing through a new (to me) Jerome Gambit (1.e4 e5 2.Nf3 Nc6 3.Bc4 Bc5 4.Bxf7+) game, I encountered an unusual line, with a strange improvement/recommendation that I'd seen sometime before...
UNPREDICTABLE - Sanomis
4...Kxf7 5.Nxe5+ Ke8
This is not one of the usual Jerome Gambit refutations, and a pretty rare choice of move, although it's been touched upon in "You, too, can add to Jerome Gambit theory!" and "Ooops..." 
analysis diagram
Best play now seems to be 7.d4 Qxe4+ 8.Qe2 Qxe2+ 9.Kxe2 when, after a dance of the pieces, 9...Bb6 10.Nb4 Bxd4 11.Nd5 Kd8 the position is equal.

analysis diagram
This is not the thunder-and-lightning play of Whistler's Defense, which is clearly better for Black, but it's probably not the kind of position that White was hoping for when he sacrificed his Bishop.
Instead, Black simply captures the Knight on c6, and then realizes that he will be two pawns down with an uncastled King and no counterplay.
6...dxc6 7.Qh5+ Black resigned


4...Kf8







Here we have a "typical" Jerome Gambit middlegame: a real mess.
The wrong choice.
A perplexing move, not only allowing 18.Qf5+ drawing as above, but also allowing the flashy 18.Bd6+ which also draws.
White's response in the game, however, allows the routine capture of his Knight, and the magic is again gone.
18.Qg6 dxe4
The light-square weaknesses are still around the Black King, but White no longer has his Knight to keep check-blockers off of f6.
Instead of interposing the Queen with 20...Qf6, allowing 21.Qc5+ and 22.Qxc2, reducing his advantage, Black again allows the light-square repetitions and the draw: 21.Qe6+ Kh7 22.Qf5+ Kg8 23.Qe6+ etc.

This move should seriously scare White into going for a draw. For a moment, it looks like it does.
Okay: Now, after 23...Kxg7 24.Rg4+ Qg5 25.Qd7+ Kf6 26.Rxg5+ hxg5 27.Qxd2 White will have a Queen and a pawn to balance out Black's two Rooks. A complicated, but roughly even, game.
26...Ke6 27.Qh6+ Kd7
Now 28.Qh5, guarding against the passed pawn Queening (if 28...Kc8, 29.Rf8) and preparing to finish up the King, looks like the proper reward for White's fighting spirit.
Unfortunately, he has a worried eye on Black's passer, and decides that "more checks to the King" is the answer. It is not – but the excitement is hardly over.
Black can afford to allow his Queen to be pinned to his King: he plans on getting another one.
29.Qe6+ Kb8 30.Kh2 d1Q
Black has travelled far from his "doomed situation" mentioned in the note to White's 23rd move. He figures from here on out, it's just a matter of technique.
What was called for was something that ends the clutter, something like 31...Qxf8 32.Bxf8 Qd8.
Black's move, however, lets loose the chaos again.
White now has the remarkable 32.Qe7, after which, despite being a Queen down, he can enforce the draw, obtain a better position, or checkmate Black: 32...Ka7 ( 32...Qc8 33.Rxc8+ Kxc8 34.Qf8+ Qd8 35.Qf5+ Qd7 ( 35...Kb8 36.Qxc2 +-) 36.Qf8+ Qd8 37.Qf5+ draw) 33.Qc5+ b6 34.Rxd8 Rxd8 35.Qxc7+ Ka8 36.Qc6+ Ka7 37.Qc7+ draw
Amazing!
32.Rxd8+
Aquiescing to the loss. Well, not exactly: White still has a handful of "Jerome pawns" and decides to put them to use. Still, thirty moves later White resigned. 