The 5e D&D Basic Rules v0.1 description of the second-level cleric spell Aid says (p. 83):
Your spell bolsters your allies with toughness and resolve. Choose up to three creatures within range. Each target's hit point maximum and current hit points increase by 5 for the duration.
I'm a bit confused as to what is supposed to happen to the PC's current HP when the spell ends. Obviously if it's above their normal maximum, it should fall. But do they lose 5 of their current hit points even if it's already lower than their regular hit point maximum? That seems to be what the text is saying, but that seems off to me.
It sort of makes the Aid-granted hit points the opposite of 5e's temporary hit points, in that they're lost last.
In short, I don't trust my reading of the spell. Can anyone help explain it to me?