So, I'm playing D&D.

The DM tells me "You see a shimmering pool through a hole in the floor below."

I think briefly. "I jump through the floor, and into the pool."

"And everyone else?" the DM asks.

The rest of the party agrees to follow. There is, after all, nowhere else to go.

"Ah ha! The pool is cursed!" the DM says, triumphantly. I knew I should have rolled a perception check.

I'm then plummeting into the pool, myself, not the character. Apparently, the DM has a flair for the dramatic. Indeed the pool is cursed: every second under the water is a year of pure agony, like bathing in acid. I try to come up for air, only to be pulled immediately back down by some unknown force.

Somehow I make it out of the pool. I then realize that everyone else is still in the pool, and drowning. I'm able to get two people out, but not the others.

For a while, we lay there, coughing up the corrosive water.

Then I wake up.