User blog comment:Dan67/Create a Zombie/@comment-5276866-20150506174708

Thermal weapons might lose popularity though.
 * 1) The Plasapane is like a Bloater, but isn't as 'bloated'. Instead of being filled with fluids, it's filled with all sorts of gases as a result of its own decomposition.
 * 2) The gases inside the Plasapane make it extremely flammable, and will cause it to violently explode if hit by rounds from a thermal weapon. The ensuing death fireball (not a ring like the Wicker's; more of an explosion) sets all nearby zombies alight, giving them the Fiery Skin buff, and will also burn the player if they're close enough. The gases also give the Plasapane the advantage of being very light, allowing it to move quickly—faster than all other zombies except the Runner.
 * 3) Around whatever level the Bloater appears. But it should be, like, way more common than Bloaters, but perhaps not as common as the other non-boss zombies. Wait, wat? It has to be a boss zombie? That's no fun D: