This is first obtainable on Level 3 (The Forbidden Mine). At the very end of this level is where these enemies will first appear. They aim their jump so that they land on where you were last standing before they jumped. Just make sure you are standing near a shotgun shell before they start to jump and then they should land near it and make it explode which unlocks this achievement. The shells are the big red dynamite looking things standing up in the open. The Jumper doesn't have to die from the explosion for this to unlock.