The traps that remove HP technically take off 1 HP more than the end result, but 1 HP is added on after. For example, the large pink flowers remove 1000 HP, then add 1 HP. Since when removing the HP the player cannot fall below 0, the added 1 HP will put them if they have less HP than is being taken off. Due to this, if a player enters one of the flower traps with a member in the Death status, they are brought back to life with 1 HP.