"A chasm looms before you. There is a narrow ledge along wa wall of rock, beyond which is a stairway leading to a door."
"Ok, I'll walk across that ledge."
"Roll a dex check."
"17"
"You make your way across the ledge. Unfortunately there is a piece of the ledge crumbled away."
"Is it wide enough that I can jump across?"
"Yes."
"Ok, then I'll jump."
"Roll."
"8"
"You come up just short and fall to your death. Unfortunately there are no checkpoints or passwords, since this is not a video game. You are dead, Belmont, and now Dracula will reign over this world!"
"I want a new DM."