The Gotcha skillshot is achieved by leashing a stunned Creep or Skull Flaregunner, kicking him, and killing him mid-air. Flaregunners will not dodge a kick, so you can easily kick and leash them. You can only land a kick on a Creep by backing it into a wall. Otherwise either one could also be leashed when they are wrapped up with a flail or stunned from another attack.