Man, I really miss meta-props (being able to add any game script to about anything).
I hadn't thought of a negative hurt. Gonna try it just for kicks.
I thought about regen for a sec, but it would be really weird to gain health and ammo in that spot.
It's walking through my waterfall that I wanted the player to be extinguished if they were on fire. There is already a very very minor hurt trigger there to simulate the pounding of the water fall and to try and discourage camping. We'll see how that goes. There's also a slight downward/outward push.
An invisible (not rendered) health pack might be close, haven't tried it yet. But I don't really want to give players health for standing in water, just wanted to stop burning.
If all else fails there is a health pack close to one side and a pool of water to the other.