Offer them a different target
From Create Your Own Story
Thinking fast you yell, "Hey, pick on someone your own size." Even in the dark you could tell that this comment wasn't exactly accurate. The man unbuckling his belt is about your height but wider with broad shoulders and arms that showed he clearly worked out. As the man that had been pinning Melanie down got off the bed you saw how huge he is, must be 6'4 and as wide as an ox.
Your comment certainly caught their attention but you now feel unsure of how wise it is to do so. They both abandon their attempt to rape Melanie but now are rushing at you. You turn and run as fast as you can back to your room. You still have your bat in your hand and even though you lost the element of surprise, you could try to take them out in your room. You also remember what they were trying to do to Melanie. Maybe if you offer the same thing they'll leave you alone after.
Do you: