Beat the Caro-Kann with 4.Ne5!
After 4. .. e6, you have just transposed into French territory with the white e-pawn already traded for black's c-pawn. I generally do not like the French, but I would take black here.
4...e6 is a fine move, though it usually transposes to the other lines, especially if black follows up by playing something like Nc6 or Nf6. The only real independent line is when black plays e6 and then Bd6. The computer says this is equal, but black must be willing to play with his king in the center - not everyone's cup of tea.

In this position, Black must play 8.---- Ne4!!! It is critical move for black, 8.--- 0-0?? is strategically hopeless.
2000+ players do lots of critical mistakes. Winning cos of opponent's critical mistake is not a theoretical advantage. Interesting to try in blitz and bullet anyway.

4....... Bf5 is suicidal critical error! Of course people can do critical error in unfamiliar position..

No need to take 5-----. Nxe5, strategical mistake, King knight will be misplaced from his best f6 square.
Looks interesting, what do you think is the most challenging line black can play against this?
If we're playing black I would try to find a way to play Bf5. You need to prepare this however with Nc6 and a6, but once you get Bf5 in I don't see how white has anything substantial. This is not the easiest plan to forsee if you haven't prepared it beforehand however. Sometimes players try to force Bf5 right away and get punished for it.
In this position, Black must play 8.---- Ne4!!! It is critical move for black, 8.--- 0-0?? is strategically hopeless.
2000+ players do lots of critical mistakes. Winning cos of opponent's critical mistake is not a theoretical advantage. Interesting to try in blitz and bullet anyway.
And what if white played 9.Bxe4 dxe4 10.Nd2. Black appears to lose a pawn here because 10...f5 loses to 11.Qh4.
That being said - black probably should have played 7...Ne4! Then White will have to play something slighlty awkward like 8.Qf3 bcasue 8.Bd3 fails to 8...Qh4!
The point of white's play is 9.f4 instead of 9.Nxc6. Black still has ways to defend of couse, but white's whole plan is trying to have a central squeeze. (In fact, Qe2 might be omitted altogether, with 8.f4)
Okay yes Nxd4 in this case. Another reason why Qe2 should have been omitted and f4 been played on move 8.
Apparently some good players actually play this stuff.
Gawain Jones Sucks. Couldn't even beat Carlsen a piece up.
Looks strange right? Moving a piece twice in the opening is often a bad idea. Here however, it makes some positional sense. Consider the caro kann exchange - a pretty common opening:
One of the reasons black plays Bg4 is to prevent white from playing Ne5, f4, and the development of a kingside attack. So with 4.Ne5 (the so-called "apocolypse attack"), white pre-empts this with playing Ne5 right away! And if black doesn't understand the right positional ideas, he can get quickly and brutally destroyed. Below are some of my favorite games with this line: