When HYDRA comes into your house or place of employment, how do you repel them? Oh, you know all sorts of karate and you've been augmented by Super Soldier Serum? Dang. I was going suggest using the Captain America Symbol Rubber Wristband but it is probably good that you have it covered. I'm not entirely sure how the one size fits most Captain America Symbol Rubber Wristband helps to dissuade HYDRA anyways.