Quickly

You jump swiftly onto the first stone, and then the next, not wanting to waste a second for fear of suffering the consequences of running out of time. You believe you're going to beat this game and you're going to do so in expert time.

However, as you jump for the third stone, you lose your balance for just a moment. That's all it takes for you to trip and fall front-first into the mire below. Your entire front, including your face, chest, and crotch, and slathered in mud.

You begin to try crawling out of the stuff.