Modifies health (can be set to 0), plays an animation, and then goes away.
Health Modifier This is the amount of Hit Points that are added to the player's total when this object is triggered. To do damage, use a negative number, to add health, use a positive number.
Example
The Devious designer creates a bomb. He gives it a health modifier of -5 because he wants it to do some serious damage when it goes off, and Playman only has a total of ten points of health.