How do you fake a sprained ankle?

I'm going to my friends house and they always tease me about how i am a klutz so i am going to wrap my ankle then hop around and act like it hurts really bad. i am even getting my moms help. she is going to help me out of the car and help me hop to their door. but were going swimming so i am going to unwrap my ankle and swim but when im faking will i be able to put pressure on it to walk around? plus any other ways to make it more real please tell me. thanks