Top three most effective opening traps?

Here's a nice one that occured in one of my games:

That's the problem with premoves.

: ) i like black's bishop so peaceful and would not capture his brother bishop right away :D

i did not get the joke btw!

Cool.

This is nice little trick for black when white decides to go into a four knights game.. 

This trap works Time to join the budapest gambit group

Not really a trap but a really exciting way to attack the solid alekhine defense. It is called the Krejcik variation.

That Krejcik Crazy Opening can be very tricky if Black doesn't know what to do.  I have over a dozen wins with it in casual play.  Here is a quickie.

 AFAIK Many say that this variant gives a small advantage to black

And this one, very little known, and even a mistake on some opening books (eg: on Chessmaster Grandmaster Edition!)

Xiko,

In the right hands, this variation may be good for Black.  There are several FIDE masters and 2300+ players who play it and win.   Here is a typical game.

There are many good traps in the budapest

The Budapest is always good for a trap or two.  Here is one of my early Budapest games from tournament play.  In the game 6.h3?? is the losing move.  Best may be 6.e3 or 6.Nc3.  After 6...Nxf2 and threatening 7...Nxh1, what else does White have besides 8.Kxf2?  If 6.Qa4+, then 6...Bd7.

surprised he played Kxf2 at a championship match, you would think he would have seen the trap by then. Nice trap by the way. 

I like this one since it doesn't rely on the trap to get a decent position out of the opening:

And Fischer's line in the Caro-Kann, which doesn't necessarily win material, but unless avoided (and natural moves lead right into it) gives black a horrible position: