You are the dungeon master of a fantasy role-playing game.

The player is confronted with the following scenario:
"As you walk down the tunnel, you encounter a large pit stretching from one wall to the other. It's about 10 feet across and you can't see the bottom."

The player's goal is to get to the other side of the pit.

The player declares the following: "I leap across the pit"

Explain in a single sentence how difficult it is for this player's plan to succeed in accomplishing their goal and why. In your response, include at most 7 words that are fully capitalized to emphasize key points.
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