Jyrki Heikkinen in his blog, Gambits and Pieces, writes about one such game which he played.
“White's obvious target is the f7 square. Without knowing the theory recommendation 8.Bc4 e6 9.Nh3, I … played a prophylactic move.”
What was this move? See the game at Gambits and Pieces: My shortest checkmate in BDG. And while you’re there, have a look around Jyrki’s blog. There’s more there than the BDG. It’s “the world of crazy gambits: Diemer–Duhm, Blackmar–Diemer, Staunton, Fajarowicz and more.”