Cry or create a scene of emotional or mental instability. Fake a faint. Fake an epileptic seizure. Keep in mind that the rapist is often a con artist himself, so whatever measure you use should be unexpected and convincing. Whatever you choose, follow through with it once you start.
Active resistance is intended to distract, discourage, or forcefully stop the attacker.
It can range from a simple whistle or scream to fighting tactics. It is very important to realize the ANY FORM of active resistance risks reprisal from the attacker and could possibly make them much more violent. It is important to work out tactics in advance and make your best effort the first time. You'll want your actions to be unexpected and immediately effective. The following are known defensive measures.