Magma Men are dangerous obstacles, but thankfully, not difficult to deal with. They're not usually possible to kill, as they have enough health to potentially survive even a bomb blast. Luckily, they have a very short lifespan, so the best course of action is usually to simply wait until it dies by itself. If you're in a hurry or being chased by an enemy, it's not too difficult to jump over one. They're only really dangerous if they wander too close or manage to corner you, but luckily, they move very slowly.