The Blackburne-Shilling is a nice little trick you can play as Black in the Italian Game. Usually after 3.Bc4 Black will respond with a routine move like 3...Bc5 or 3...Nf6.
If you have Black you will be happy to hear that in this position you can roll the dice. Now you can throw in the surprising move 3...Nd4, apparently self-destructing.
White can get an advantage with theoretical knowledge and correct play. As usual though, without this knowledge the correct move is not always easy to find.
White should of course continue by exchanging Knights with a good game to come. Taking the pawn however and threatening f7 may prove to juicy to turn down.
It's in this position that Black can spring his plan into action. 4...Qg4 (forking the e5-Knight and g2-pawn) 5.Nf7 (trapping the h-Rook) 5...Qxg2 6.Rf1 Qxe4+ 7.Be2 (saving the Queen but falling for the stunning...) 7...Nf3#.