http://forums.sjgames.com/showthread.php?t=57020&page=13the whole thread is fucking crazy (probably a troll but whatevs)
DM (Me) You enter a room with a large pool of water in it.
PCs: Good, we are short of water and we need to refill our canteens. But first we will check to see if it is really water. I'll cast Detect Magic to make sure the water is not enchanted.
DM: OK you cast the spell and the pool radiates no magic.
PCs: OK, we will have our cleric perform a ritual to see if there is any divine power upon the pool of water.
DM: The ritual detects no divine power upon the pool of water.
PCs: OK we'll have our psionist check to see if there is any danger in drinking the water by using precognition.
DM: There seems to be no danger sensed.
PCs: OK we will have our wizard cast Seek Water to see if in fact the pool is filled with water.
DM: The spell leads to the pool before you.
PCs: Alright, then we will put a canteen on a stick and then place it in the pool to fill it up and also to see what happens to the canteen.
DM: The canteen fills normally and the canteen seems fine.
PCs: OK, then we will have our alchemist analyse the water to check for properties like boiling point and reactivity.
DM: The alchemy properties are what you would expect from water.
PCs: Good, OK our cleric will cast Purify Water on the canteen to remove any possible poisons.
DM: The Purify Water seems to work.
PCs: OK, now we will need someone to test the water, any volunteers? No? OK, we will draw straws....looks like the psionist is chosen.
Psionist: OK, I will use my Danger Sense again to make sure. Then I will use my precognition power just to be safe.
DM: There seems to be no danger.
Psionist: OK, I will take a very small sip of the water...What happens?
DM: Sorry your mouth takes 8d+2 damage as the water was cosmically obscured lava powered by chaos that retains all properties of normal water until it is ingested by a sentient being.
Psionist Player: OK, I will make an elf Scout next so give me a few minutes.