From the famed Fried Liver Attack (1. d4, d5 2. Nf3 Nc6 3. Bc4 Nf6 4. Ng5) to others; I am going to be alert but not altogether weary of entering into these setups; because maybe it puts a little bit of fun in a game; it would be fun if one actually coaxed an opponent into some of these situations; having either side.
http://www.chesskids.com/level2/cl6... <--- Here is the Fried Liver attack and a good illustration;
http://www.chesscentral.com/pickard... <--- Apparently a book is out on this topic.
http://www.johnpratt.com/items/ches... <--- An illustration of what can go wrong!
http://members.aol.com/manusfealy/c... <---- Yet, another fine page to peruse!
http://www.chessbase.com/newsdetail... <---- Dubbing it the "Chigorin Counter-Attack.
This may be the similar Lolli Attack; 1.e4 e5 2.Nf3 Nc6 3.Bc4 Nf6 4.Ng5 d5 5.exd5 Nxd5 6.d4!
This collection is in it's infancy and I am not sure if I have it all straight yet. I am not sure if similar situations could rise in the Giuco Piano as well; however the notes in the Batsford Chess Openings edition, reprint 1987 reads on page 308:
"White may ... plunge into a maelstrom of complications with 4. Ng5, when he must be ready to cope with the main lines stemming from 4. ... d5 as well as the obscurities of 4. ...Bc5!?, the Wilkes/Barre Variation. At present, these discussions are usually conducted in correspondence rather than over-the-board circles due to the intensely confusing positions that result. Theory (and there is a great deal of it available) has yet to reach a definite conclusion concerning these hair-raising lines." (pg. 308)
I am so-so with artistic endeavors; but this is a bit like Dada and Marcel Duchamp's works to me.
Update: Neil McDonald in his Concise Chess Openings suggests to play the Knight takes Pawn move; Now, I wouldn't be fearful to stray in these waters if ever confronted by this again; but it is something to be aware of.