You get jumped!

A few steps later, you suddenly feel a hand around your mouth. You leap out of your skin with fright!

-3% Dimension Satisfaction

Your body, completely unprepared for this sudden assault, reacts completely on reflex. You throw your head back at just the right speed and angle to connect with your assailant's head as he was turning it, in just the right spot to make his head go ringing. He drops to the floor, howling with pain.

"Shit! Ow! Damn!" He yells.

You hotfoot it out of the alley before he can recover, thanking your lucky stars. If you'd known he'd be there, you probably wouldn't have reacted in exactly that way, and he'd probably still have a strong grip on you right at this moment.