ITT if you can escape J4's ult, you counter him in lane
Outside of the big 3 (Elise, Irelia and Xin), there's a lot of matchups that are kind of even but can be abused due to people's weaker early games. What makes J4 devastating to is the fact that he can harass so well (EQ+AA > walk away, E or Q to poke, etc). Once he gets you low enough, the ult adds to the nuke and puts you in a bad position to fight back.
Chicago Bears 8-8, 3rd NFC North (2011-2012 Season) WE LIKE IKE! Aethering to victory.