Health attribute with a negative value, "kills" player

After putting part of the armor with health attribute on the negative level on a player and than dealing a small damage to the player, he dies in a very specific way (Shown on the video).

Commands:

/replaceitem entity @a armor.feet diamond_boots{AttributeModifiers:[

{AttributeName:"generic.maxHealth",Name:"generic.maxHealth",Amount:-16,Operation:0,UUIDMost:12272,UUIDLeast:110438}

]}

/effect give @a wither 1 100 true